Bubblegum girl: Katy Perry arrived looking unseasonably summer in a baby pink jacket and sunglasses patterned dress
Katy posed alongside designer Jeremy Scott, who rocked an equally outlandish ensemble and a similar rolled quiff hairstyle.
Jessie's curly bobbed 'do and yellow leopard-print Dolce & Gabbana dress were quite a departure from her usual bodysuits and shorts.
Teen queen: Singer/actress Selena Gomez looks pretty in a cream Marchesa lace creation as she arrives at the MTV Europe Music Awards at Belfast's Odyssey Arena
No problems: Justin Bieber looked relaxed as he posed on the red carpet with actress Hayden Panettiere

Making a fashionable entrance: Israeli model Bar Refaeli (left) and Russian model Irina Shayk both showed off heir legs in tight dresses

Figure-hugging: Hollyoaks actress Jennifer Metcalfe got attention in her shiny leggings and plunging sheer blouse

Glamour: (L-R) London singer Katy B wore a black jumpsuit, Britain's Next Top Model winner Jade Thompson shimmered in silver, while Hayden Panettiere wore a patterned black mini
Teaming up: Snooki and her Jersey Shore castmate Jenni Farley both chose black and silver dresses
Sharing the limelight: Amy Lee and Tim McCord of Evanescence took to the pink carpet together, while Jason Derulo teamed up with David Guetta

In the pink: Bruno Mars and his band embraced the spirit of the occasion with suits that matched the carpet

Goofing around: David Hasselhoff joked around for the camera... but didn't bring his girlfriend Hayley Roberts

Here come the boys: American electro-pop duo LMFAO (left) and rock group 30 Seconds To Mars