The 30-year-old pop star
debuted her new single "Fly" during the ceremony, and later shared on Instagram that she was "honored" to be a part of the festivities.
"This was a very beautiful night for me," Lavigne wrote. "Congratulations to all the athletes."
"It has been a difficult year fighting through Lyme Disease for me and I am so happy to have made it on stage tonight for the first performance in a year," Lavigne continued. "Thank you for having me."
Lavigne went on to explain that she wrote "Fly" to "encourage people who are facing challenges."
Lavigne looked striking on stage in a long, embellished black Alice + Olivia gown that she paired with shimmering jewelry from Le Vian.
The "Sk8er Boi" singer showed off her elegant look in another Instagram post, snapped backstage before the performance.