Is that you, Demi Lovato
?! During a recent concert, the 21-year-old "Skyscraper" singer went undercover and dressed in a funny costume inspired by Justin Timberlake
and Andy Samberg
's infamous Saturday Night Live
music video "D--k in a Box." Lovato was unrecognizable when she crashed the stage wearing a short dark wig, sunglasses, a fake mustache and a suit with a giant gift-wrapped box attached to her crotch. During the stunt, Lovato surprised fans and her tour-mate Collins Key, who was also on stage during the hilarious bit. Lovato shared a funny backstage photo of her getup on Twitter with the caption, "#whatsinthebox @CollinsKey." Key wrote back, "#WhatsInTheBox...