Taylor Swift and Halsey Couldn't Stay in Their Seats When Selena Gomez Sang at the AMAs

Surround yourself with friends who support you like Taylor Swift and Halsey support Selena Gomez. The 27-year-old singer opened the American Music Awards on Sunday night with an emotional mashup of her hits "Lose You to Love Me" and "Look at Her Now" and received a standing ovation from her celebrity pals.

Her performance kicked off a big night for the trio of pals, with Selena's opening number being followed by Halsey's win for best pop/rock song. Shortly after, Taylor took home a big award for favorite pop/rock album of the year. The "Lover" artist also received the AMA's artist of the decade. Ahead, see clips of the stars cheering Selena on during her moment onstage.