Singer celebrates with husband Jordan Bratman

The film A Clockwork Orange was the inspiration for Christina Aguilera‘s 28th birthday bash.

The singer dressed up as the lead character from the 1971 Stanley Kubrick movie.

Wearing a bowler hat and jumpsuit, Christina was joined by husband Jordan Bratman at the SLS Hotel in Beverly Hills.

They sipped on her favourite cocktail, the cotton candy mojito, dined on an orange cake and were entertained by DJ AM, 35, real name Adam Goldstein, on the decks.

Other guests at the bash included Nicole Richie, 27, and fiancé Joel Madden, 29.

Christina ended the night by checking into the hotel’s presidential suite with Jordan, 31.

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