Nick Jonas celebrated a big milestone: his song "Jealous" hit number one on the charts! To commemorate the achievement, he brought his friends together for a cool #1 Top 40 Radio Celebration party in California last night!
He looked so handsome for his exciting occasion, rocking a blue leather jacket and casual tee for his party. His brother Joe Jonas wore all black for the party – as did one of his crop top-clad guests, Demi Lovato, who brought along her boyfriend Wilmer Valderrama for the big day.
Click through the gallery to see pics from Nick's party. Do you think it's cool that his friends came out to support him? Let us know in the comments!