Why Justin Bieber turned down Usher's offer to perform with him at the Super Bowl

Why Justin Bieber turned down Usher's offer to perform with him at the Super Bowl

Music exclusive Usher asked Justin Bieber to take part in his Super Bowl half-time show — but the “Baby” singer “wasn’t feeling it,” sources told Page Six. Before Sunday’s event, Bieber’s longtime friendship with Usher sparked social-media rumors that the two would team up onstage in front of the 65,000-strong crowd and a global audience of millions. Instead, a slightly worn-out looking Bieber, 29, and his wife Hailey, 27, watched his one-time mentor’s show from the comfort of Fanatics co-owner …