A song for a man in a music competition?

My husband is in a music competition, made it into the second round, and now needs to pick a new song and be ready on friday. They want to hear him sing something inbetween the songs they already heard...his style, which is similair to Jason Mraz, and the other song was Yesterday by Billy Joel. He needs something to show off his ability to really belt out and hold the long high notes. He is a Tenor, so it cant be -to- high. I dont know very much about music myself, so I hope I got enough information on here. Thanks in advance.