23/12/2011 04:50 GMT

Cheryl Cole And Nicola Roberts Enjoy Pre-Christmas Rihanna Gig

Best friends Cheryl Cole and Nicola Roberts enjoyed a festive night out on Thursday when they rocked out at Rihanna's London show.

The Girls Aloud bandmates donned their gladrags after landing tickets to the Umbrella hitmaker's Loud concert at the O2 Arena.

The show was Rihanna's last on her current tour, and the two pals had a bird's-eye view from their own box at the gig.

Cole was clearly impressed by the performance, and she applauded the pop star for her stamina at staging almost 100 of the concerts.

In a series of posts on her page, she writes: "Just left Rihanna's last Loud concert. Amazing!! To put on 98 of the same shows like that and give your all takes something special.

"Congratulations on completing your tour Rihanna. Have an amazing Christmas, well deserved break and another amazing year! I'll drink to that."

Roberts adds: "The last night of a tour is always special... Rihanna rocked it tonight!!!"

Rihanna was clearly feeling emotional at the end of her tour, telling fans: "I should feel better about people saying 'Congrats on my last show' no? Feels like a break-up!!"

And replying to Cole's messages, she gushed: "U (sic) are a sweetheart! Really!!! Thank you."