Justin Bieber announces birth of son -- Jack Blues

"WELCOME HOME JACK BLUES BIEBER," the Canadian singer posted with a photo of an infant's foot wrapped in a blanket, which has racked up more than eight million likes. The celebrity couple announced in May that they were going to be parents, posting pictures of fashionista and businesswoman Hailey, 27, cradling her belly. Justin Bieber, 30, first shot to global stardom as a teen pop sensation in 2009, since then churning out hits including the mega-selling "Baby", featuring rapper Ludacris, and "Somebody to Love." His army of fans...