Jennifer Lopez has been taking a lot of heat for her maybe, maybe not, wardrobe malfunction during this weekend’s Oscar’s ceremony. And she wasn’t even safe from teasing on national television, on her own show! On last night’s ‘American Idol,’ Steven Tyler teased her about her apparent nip slip. "Who am I?" Tyler playfully asked the audience during Tuesday night's Idol, before sneezing and pulling his shirt open to reveal his chest. "There was no nipple!" an embarrassed Lopez responds. Her wardrobe stylist has also denied the Academy Awards wardrobe malfunction. Even though Tyler was picking on her, JLo was getting support from one audience member! Her boyfriend Casper Smart was there and the two kept smiling and sneaking peeks at each other throughout the live show.