Cheryl Cole popped in to check out her good friend Rihanna's last show at London's O2 Arena last night and tweeted afterwards that it was 'amazing'.
The Girls Aloud singer told her Twitter followers of her admiration for the pop sensation after watching her wrap up an impressive 98-date Loud tour in London.
She tweeted: "Just left last #Loud concert. Amazing!! To put on 98 of the same shows like that and give your all takes something special."
She later added: "Congratulations on completing your tour @rihanna Have an amazing Christmas, well deserved break and another amazing year! #illdrinktothat X [sic]"
Cheryl was joined at the concert by band-mate Nicola Roberts. The two both flashed the peace sign for the camera as they enjoyed some drinks backstage after the show.
While Cheryl looked chic in a cream cable knit jumper, beige trousers, a hat and brogues, Nicole wore a grey jumper with leather trousers for the occasion.
Nicola later took to Twitter to add her praise for Rihanna: "The last night of a tour is always special... @rihanna rocked it tonight!!! #RudeGirl [sic]"