Technically speaking, of course.
After wrapping up her high-energy tribute to late salsa icon Celia Cruz, J.Lo said the "TKO" crooner stopped by her dressing room to tell her how impressed he was.
"He was like, 'Oh my god, what was that?' He said if it wasn't so violent, 'I would punch you in the face right now 'cause I'm so excited! It's best performance I've ever seen of you,'" J.Lo told Extra. " I'm a huge fan of his as well. I was very touched. It made me feel good."
Justin wasn't the only superstar in the room wowed by the "Hit the Floor" crooner's performance.
When the tribute was over, J.Lo received a standing ovation.