09/25/2009 AT 1:35 PM ET
Justin Guarini is known for his mane of wild, curly locks – but these days the singer’s smile is even bigger than his hair. And for good reason: He announced Thursday that he’s getting married over the weekend.
“He’s doing really well, he’s excited,” says Guarini’s pal and publicist Jeff Ballard. “This is the happiest I’ve ever seen him. He’s smiling from ear to ear. I don’t know what’s bigger – his teeth or his hair.”