Imagine the scene. You've won a competition to be at the launch of Rihanna's River Island clothing launch (pretty amazing in itself, right?), but as you're trying on some of her designs in the dressing room, the actual RiRi pops her head in to see how you're getting on.
Pretty crazy, huh?
Well, that's exactly what happened to one lucky Rihanna fan on Monday as her fashion range hit stores.
Cue one very over-excited member of the RihannaNavy as the popstar casually stood in front of her changing room door.
Watch the video above to see RiRi give the fan the surprise of her life.
Rihanna launches River Island range
Rihanna for River Island Collection Launch - London(01 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(02 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(03 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(04 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(05 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(06 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(07 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(08 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna fashion line - London(09 of32)
Rihanna makes an appearance at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna For River Island - Store Launch - After Party At DSTRKT(10 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(11 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(12 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(13 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(14 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(15 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(16 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(17 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(18 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(19 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(20 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(21 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(22 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(23 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch - After Party At DSTRKT(24 of32)
LONDON, ENGLAND - MARCH 04: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME. MANDATORY CREDIT PHOTO BY DAVE M. BENETT/GETTY IMAGES REQUIRED) Rihanna attends the exclusive after party following the launch of her Rihanna For River Island collection at DSTRKT on March 4, 2013 in London, England. (Photo by Dave M. Benett/Getty Images) (credit:Getty Images)
Rihanna for River Island Collection Launch - London(25 of32)
A model showcases Rihanna's new fashion line at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(26 of32)
A model showcases Rihanna's new fashion line at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(27 of32)
Models showcase Rihanna's new fashion line at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna for River Island Collection Launch - London(28 of32)
A model showcases Rihanna's new fashion line at the River Island store in Oxford Street, London, to promote her new fashion line. (credit:PA)
Rihanna For River Island - Store Launch(29 of32)
LONDON, UNITED KINGDOM - MARCH 04: Rihanna attends as the Rihanna for River Island collection is launched at the Oxford Street River Island store on March 4, 2013 in London, England. (Photo by Stuart Wilson/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch(30 of32)
LONDON, UNITED KINGDOM - MARCH 04: Rihanna attends as the Rihanna for River Island collection is launched at the Oxford Street River Island store on March 4, 2013 in London, England. (Photo by Stuart Wilson/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch(31 of32)
LONDON, UNITED KINGDOM - MARCH 04: Rihanna attends as the Rihanna for River Island collection is launched at the Oxford Street River Island store on March 4, 2013 in London, England. (Photo by Stuart Wilson/Getty Images) (credit:Getty Images)
Rihanna For River Island - Store Launch(32 of32)
LONDON, UNITED KINGDOM - MARCH 04: Rihanna attends as the Rihanna for River Island collection is launched at the Oxford Street River Island store on March 4, 2013 in London, England. (Photo by Stuart Wilson/Getty Images) (credit:Getty Images)