We have a feeling Rihanna has a very low boredom threshold. When the singer's not getting her kit off, she's getting a new tattoo.

She might only be 24 but the singer has already been inked 14 times and now she's made it 15 with a brand new crucifix design on her collarbone.

Ouch.

The singer popped along to her favourite tattoo artist BangBang's studio in New York to get the latest design completed. It's not the first time he has tattooed the singer - he was also responsible for the controversial gun design she had done on her rib cage in 2009, which came just months after her Grammy night fight with her ex Chris Brown.

BangBang told MTV News at the time: "People are going to react all different ways. She's great. She's perfect. We had a blast, and we had a lot of fun."

He is also responsible for the Roman numerals on her shoulder, the stars on her back and the word 'Shhhh' on her finger (above).

Other tats in Ri-Ri's ever-growing collection include the phrase 'Never a Failure, Always a Lesson' scrolled across her collarbone, a skull and cross bone on her ankle and a star in her ear.

WHOSE TAT IS THAT? GUESS THE CELEBRITY INK

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• Tattooed Celebs

  This lady wasn't allowed a tattoo when she was younger... (credit: Big Pictures)

• Tattooed Celebs - Sarah Harding

  Sarah Harding (credit: Big Pictures)

• Tattooed Celebs

  Sunshine n' showers? Only at the weekend... (credit: Big Pictures)

• Tattooed Celebs - Frankie Sandford

  Frankie Sandford (credit: Big Pictures)

• Tattooed Celebs

  We think they're meant to be doves but they look more like pigeons to us. Well, you can take the girl out of Croydon... (credit: Big Pictures)

• Tattooed Celebs - Kate Moss

  Kate Moss (credit: Big Pictures)

• Tattooed Celebs

  The owner of these wings hasn't always been angelic... (credit: Big Pictures)

• Tattooed Celebs - Kelly Osbourne

  Kelly Osbourne (credit: Big Pictures)

• Tattooed Celebs

  Well she's definitely a star - and that blonde hair might be a bit of a giveaway... (credit: Big Pictures)

• Tattooed Celebs - Sienna Miller

  Sienna Miller (credit: Big Pictures)

• Tattooed Celebs

  This leading lady has more tats than kids - and that's saying something! (credit: Big Pictures)

• Tattooed Celebs - Angelina Jolie

  Angelina Jolie (credit: Big Pictures)

• Tattooed Celebs

  We wont be putting this body art through to the next round. Sorry pet. (credit: Big Pictures)

• Tattooed Celebs - Cheryl Cole

  Cheryl Cole (credit: Big Pictures)

• Tattooed Celebs

  This former wild child has more than one piece of body art in her collection... (credit: Big Pictures)

• Tattooed Celebs - Drew Barrymore

  Drew Barrymore (credit: Big Pictures)

• Tattooed Celebs

  This star is rapidly running out of space for any more tattoos. Better not have any more kids then. (credit: Big Pictures)

• Tattooed Celebs - David Beckham

  David Beckham (credit: Big Pictures)

• Tattooed Celebs

  We've no idea what this means but we really hope it translates as 'two pints and a hot pot please love'. (credit: Big Pictures)

• Tattooed Celebs - Kym Marsh

  Kym Marsh (credit: Big Pictures)

• Tattooed Celebs

  We wonder if this little princess's daddy knows about her love heart tattoo? (credit: Big Pictures)

• Tattooed Celebs - Nicky Hilton

  Nicky Hilton (credit: Big Pictures)

• Tattooed Celebs

  That'll be 'Rebel Flower' then. Quite appropriate we reckon. (credit: Big Pictures)

• Tattooed Celebs - Rihanna

  Rihanna (credit: Big Pictures)