Singer-actress Jennifer Lopez says she once knocked her front tooth out with her microphone while she was on stage."I have chipped my tooth with a mic. Oh yeah, I have done so much stuff on stage, but I feel like I have stage angels because I do such crazy stuff on stage in my shows sometimes."This is why I have bruises everywhere all the time and I have chipped my tooth on stage and had to finish the show. Like, literally knocked my tooth out and I am like, 'Oh!'," Lopez told etonline.com.She added: "I went backstage and asked: 'Can I finish the show like this?' They are like, 'Yeah, yeah. It's fine. It's just a little chip.' Or do I have to leave?"Lopez is not the only one who has experienced a red-faced moment on stage as her "World of Dance" co-judge Jenna Dewan-Tatum still cringes at the time she fell flat on her face while being a backing dancer for Janet Jackson."I have fallen on my face at least ten times. One time I fell off the stage when I was dancing with Janet. I was doing alright, you know. I am living up there and I took one step and I went foom, like, down right into the front row. Right into the (crowd). It was horrible."