Matt Encinias, a 21-year-old college student went from being an extra in Britney's latest video to pounding drinks and locking lips with the single mom of two in a rooftop pool at L.A’s Standard Downtown hotel in under 5 hours

Spears singer arranged to have the pool reopened at 2 am for the exclusive use of her group, which included then-assistant Shannon Funk and some hand-picked male extras from her video shoot.

“Britney was the first one to undress, and then everyone else followed,�? Encinias tells Us. “I turned around and saw that she was topless and she had fake tattoos of flowers on her nipples from the shoot.�?

“I was told all she wanted to do that night was kiss a boy,�? the 5’10�? California native continues. "And that’s what she did. Mission accomplished.�?

Spears, 25, suggested a game of Truth or Dare. “I was dared to get naked and get out of the pool and walk as though I was on a catwalk in a fashion show,�? says Encinias. “Britney was laughing really hard.�?