Britney Spears celebrated her 26th birthday with Paris Hilton yesterday.
The "Gimme More" singer and Paris were still partying at 4am as they enjoyed a cigarette on the balcony of the Beverly Hills Fours Seasons hotel.
Earlier in the evening, the pair attended a party hosted by Sharon Stone at the Scandinavian Style Mansion along with Britney's two friends Sam Lufti and Alli Sims.
A source said, "Around 11pm they brought a small chocolate cake and sang 'Happy Birthday' to Britney. She looked slim and pretty. We really hope this birthday and her new age will be a turning point."
The "Toxic" singer was given a generous collection of gifts at the party, including $30,000 worth of fur coats, a $10,000 diamond and gold ring, as well as $4,000 worth of Barito brand sunglasses and various T-shirts and hair products.
Britney began the evening looking elegant in a black mini-dress and white fake-fur jacket, with her new blonde hair extensions sleek and tidy. But when she left the party to continue her celebrations elsewhere, the mother-of-two flashed her panties as she climbed into her car.
By 4am Britney looked disheveled with her messy hair loosely tied on top of her head and her make-up smeared.
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