Taylor shares nostalgic picture with Nick Jonas

Taylor Swift and Nick Jonas teamed up for an unexpected performance of Jealous at the country star’s gig in the Met Life stadium.

Swift, 25, who is on her 1989 World Tour in New Jersey, surprised all her fans by bringing up former 

Jonas Brothers member onto the stage to perform along.

They both sang Jonas’ highest charting single of 2014, Jealous, reported E!Online.