Zac Efron showed his support for girlfriend Vanessa Hudgens during her final performance in hit musical "Rent" on Sunday - by cheekily tipping her $20 during a sexy striptease.

The actress starred as 19-year-old Mimi, a troubled HIV-positive stripper, in the three-day Hollywood Bowl production.

But audience members got an unexpected surprise on Sunday when Efron stood up from his front row seat to hand his belle a reward for her hard work during one raunchy dance routine for the song "Out Tonight."

Fans' video footage posted online shows Hudgens reaching out to grab the cash before stuffing it in her bra, reports

Hudgens' strip wasn't the first sexy dance he's seen - the actor recently paid a visit to a gentlemen's club in New York with another of his "High School Musical" co-stars, Corbin Bleu.

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