Pete Wentz flashed a huge grin from behind his sunglasses as he and Ashlee made their way through LAX yesterday. As Ashlee continues her pregnancy, Pete's upcoming role as a dad has given him plenty to smile and gush about. He recently talked about singing the baby lullabies already and getting parenting advice from Joel Madden. He also joked about what sports teams the baby will root for, saying, "If my dad has anything to say about it, I'm sure he will be a Cubs fan. If my friends have anything to say about it, it will probably be a Sox fan. So, knowing me, it will probably come out a mathematician." Whether or not the new Wentz will be a sports fan or a star student, he or she will have some musical genes.