Rihanna and Katy are Coach-ella, ella Gurls

Bajan singer Rihanna was performing with DJ Calvin Harris at the Californian event when she decided to pull her famous friend on stage with her for a cuddle.

Wearing tiny studded denim shorts, a midriff-baring 'Peace' top, sunglasses and a 'Boy' cap, 24-year-old Ri-Ri was at her flesh-flashing, trashy best.

Later in the day she was seen with the words 'Thug life' written across her tummy in pen while smoking a brown, naughty-looking cigarette.Katy, 27, chose a more lady-like festival look than a previous transparent number, opting for a floral sequinned dress and showing off her new long black-and-blue hair.

The girls made the most of the festival buzz and spent time raving.