The 18-year-old Swedish singer joined JoJo at the event, after she performed at Arthur Ashe Kids Day on Saturday (August 27).
Earlier in the week, JoJo sent some love to her fans with a sweet tweet.
“#TeamJoJo – you have really truly give me life. I cannot thank you enough for making it possible for me to do what I LOVE,” she wrote, just before dropping the “F*ck Apologies” remixes on Spotify. Check them below!
FYI: JoJo is wearing a Thomas Wylde blouse, Erika Cavallini pants, Saint Laurent shoes, Mega Mega rings, Carolyn Colby earrings, and an Erickson Beamon choker and bracelet.