We’re always watching celebrities. Whether they’re strutting their stuff on the runway, performing on stage, attending an award show, or simply out having fun (like Kate Upton here who is unintentionally showing off a little too much butt) – celebrities are always squeezing into tight dresses or flamboyant outfits. We love to see them at their best and we absolutely love to see them when they slip up (nip slips or otherwise). Here are 20 more nip slips and other wardrobe malfunctions that these celebrities simply couldn’t avoid.