This season Ashton Kutcher is passing the torch to a different celebrity guest host each week who will punk their unsuspecting famous friends. Justin Bieber is the guest host in the Season 9 opener, which finds the teen pop star pranking pals Taylor Swift, Rob Dyrdek and Sean Kingston.

Guest host Bam Margera pranks Tyler the Creator; Ronnie Ortiz-Magro; Tyler Posey.

Guest host Hayden Panettiere punks Dianna Agron, Zac Efron and Snooki.

Guest host Tyler, the Creator pranks his famous pals.

Guest host Lucy Hale pranks “Pretty Little Liars” costar Ian Harding. Vanessa Hudgens and Josh Hutcherson are also pranked.

Guest host Nick Cannon welcomes the New Boyz to Hollywood; Ashley Tisdale; Demi Lavato.

Dax Shephard returns to Punk’d as guest host as he takes on a Los Angeles Laker, Meta World Peace, pocket dials Chloe Moritz, and gives Lauren Conrad a lesson in recycling. .

Guest host Miley Cyrus pranks victims Kelly Osbourne, Khloe Kardashian and Liam Hemsworth.

Guest host Heather Morris pulls pranks on Joe Jonas, Cody Simpson and Emma Roberts.

Guest host Kellan Lutz pranks victims Julianne Hough, Ashley Rickards and Aimee Teegarden.

Ashton Kutcher returns to Punk’d as Kim Kardashian couldn’t be bothered and he pulls out all the stops for Drake.

Guest host Mac Miller puts the hammer down on Wiz Khalifa, tackles pal NFL star Darrelle Revis and takes T-Pain for a ride.