usher global citizen crutches

Singer-songwriter Usher performs onstage during Global Citizen 2015 Earth Day on National Mall to end extreme poverty and solve climate change on April 18, 2015 in Washington, DC

*Two weeks after undergoing foot surgery, Usher hopped out on stage Saturday at the first Global Citizen Earth Day concert on the National Mall and performed a 45-minute set.

And when he wasn’t bunny hopping, he was hobbling through songs with the assistance of custom-crafted gold crutches. The pieces from designer Elisabeth Weinstock include padding made out of snakeskin.

Ursh is giving fans a chance to win the crutches as well as the shirt he wore onstage by downloading the #GlobalCitizenEarthDay app and completing the 5 required actions.

One foot still rockin’ #GlobalCitizenEarthDay #BiggerThan

A photo posted by Usher (@howuseeit) on

The concert also included Common, Mary J. Blige and closing headliners No Doubt.

The event coincided with the 45th anniversary of Earth Day (which takes place Wednesday April 22) as well as the spring meetings of the World Bank Group and International Monetary Fund.