Watch Zac Efron Demonstrate How to Unhook a Bra

Zac Efron 'The Lucky One' video interview

Jimmy Kimmel and Zac Efron's bra-unhooking competition

Zac Efron's make-up artist bronzes up his buff torso on Baywatch set

Zac Efron demonstrates how to unfasten a bra with one hand as he promotes new movie The Lucky One

Zac Efron demonstrates how to unfasten a bra with one hand as he promotes new movie The Lucky One

BAYWATCH - 2017 - EFRON ZAC - [DVD] : Movies & TV

Zac Efron admits bulking up for Baywatch 'messed' him up

Jimmy Kimmel and Zac Efron's bra-unhooking competition

Zac Efron Wins Bra Unhooking Contest on Jimmy Kimmel Live

Zac Efron Details 'Shocking' & 'Epic' Transformation For 'Iron Claw

Watch Zac Efron Demonstrate How to Unhook a Bra

Zac Efron's co-star Emily Ratajkowski steals the spotlight in very revealing outfit