Shaquille O'Neal performs impromptu love song to Justin Bieber

justin-bieber-shaq-song.jpg Justin Bieber fans come in all shapes and sizes, including 7-foot-1, 325-pound basketball players.

After coming out of the Bieber closet in June, with an ecstatic tweet from one of the star's concerts, Shaquille O'Neal made a surprise cameo during Justin's recent Phoenix, Arizona, rehearsal.