Between Ashton Kutcher marrying Mila Kunis and starring in "That '70s Show", he hosted "Punk'd", a wonderful hidden camera show where he pranked celebrities. Some hot favourites are when Hilary Duff had the worst driving lesson of all time, Justin Timberlake thought his entire home and car had been repossessed, and Beyoncé thought she'd ruined Christmas for a bunch of children. Iconic.