Not that RiRi seemed to mind!
The 'Diamonds' singer seemed pretty pleased to meet Jennifer Lawrence while at dinner in Paris, tweeting a photo of them together with the caption: "Bumped into the extraordinary Jennifer Lawrence at dinner!"
Rihanna, 25, looked ready for a night on the town in a pink satin skirt teamed with a tiny black crop top that showed off her toned tummy. Jennifer, meanwhile, clearly had a more casual evening in mind as she wore plain dark jeans and a black strappy top.
Jennifer, who won an Oscar earlier this year for her role in The Silver Linings Playbook, was in the French capital for Paris Fashion Week.
Yesterday, she turned heads at the Dior Haute Couture A/W '13 show in a rather bizarre outfit of wide-legged pleated trousers, paired with a sugary floral crop top. Maybe not one of her best looks...
The actress, 22, will be seen on our screens later this year in the hugely-anticipated sequel to The Hunger Games, Catching Fire, reprising her role as Katniss Everdeen.
A brand new trailer for the sure-to-be-insanely-popular movie will debut at the Comic-Con convention in San Diego on 20 July, where cast members will also appear for a panel session. It hasn't been confirmed yet if Jennifer, Liam Hemsworth and Josh Hutcherson will be among the talent.
Meanwhile, Barbados-born pop star Rihanna has been all over the world lately on her 'Diamonds World Tour', which kicked off in March and runs until the end of the year. How does she get the energy for partying in every new city?!
After dinner with Jen, it seems Rihanna returned to her hotel to change outfit, showing off her amazing figure in clingy white satin trousers and a lace top.
Hopefully after all that fun she got plenty of sleep. Her tour resumes tonight in Berlin, Germany.
Check out our picks of Rihanna's brand new River Island collection - pictures:
Copyright: River Island
Watch a teaser trailer for Catching Fire below: