The Wanted performed the charity ballad 'Fill a Heart' on 'Dancing With the Stars' last night (May 14) as a four-piece. Avril Lavigne was also on hand to perform her new rawkin' new single 'Here's to Never Growing Up.'

The Wanted are a man down with Nathan Sykes is recovering from throat surgery due to issues with his vocal cords.

Despite being a four-piece instead of the usual five, the boys looked good and sounded better as they delivered the emotional track. They were coordinated in all black attire, and we lurved Max George's nerdy glasses. He really hit some notes, too, as did Jay McGuiness, who showed off his falsetto.

It was refreshing to see the Wanted perform the Tori Kelly-penned ballad, which sheds light on the issue of child hunger in America. They spoke about hunger initiatives post-performance. We love it when a boy band is philanthropic.

Lavigne performed her new hit, and we must admit that the song's gang vocal has totally grown on us. We want to sing Radiohead at the top of our lungs, too. Av also looked sizzling hot in leather leggings and stilettos, too.

We were sort of distracted by all the dancing that took place while the Wanted and Lavigne performed, but we get it. It is 'DWTS' after all.

Watch Avril Lavigne Perform 'Here's to Never Growing Up' on 'DWTS'