Just call Justin Bieber "Goo Goo"—but only if you're Hailey Bieber. The 26-year-old singer revealed his 23-year-old spouse refers to him by this pet name on Tuesday's episode of The Ellen DeGeneres Show. "Well, she calls me a bunch of weird things," he told Ellen DeGeneres while playing a round of "Burning Questions." "She calls me 'Goo Goo.' which is kind of weird, but I like it.