Britney Spears’ Halloween Night

The singer, 25, dressed as a sexy tiger as she hit Heidi Klum’s Halloween bash at L.A.’s Green Door lounge with cousin Alli Sims.

The eye-popping costume echoes Spears’ 2006 obsession with the animal when she posted this rant on her web site:

“I’m mesmerized by tigers. Their eyes, their stripes, their constant quest for survival. They almost have a sense of mysteriousness about them. They pull you in and make it difficult to look away. They make you wonder what is behind their gaze.”

Spears didn’t get that deep at Klum’s party. She and Sims showed up late around 12:45 a.m.

“She was flirting with a couple of the guys at the table, sitting with her legs crossed towards one, touching his shoulder as they laughed and chatted,” a witness says. “She was loving the attention from the crowd.”

After chatting with Klum for about 15 minutes, Spears and Sims (who had a camera clung to her neck and was overheard saying she had dressed as “the paparazzi”) left a little after 2 a.m.

They then hit a house party, where Spears emerged wearing a sombrero.