Whitney Houston and her red dress may have been the most talked-about photograph from Muhammad Ali's Celebrity Fight Night charity in Phoenix on April 5. But another pic taken that evening poses a burning question.

Are Shaquille O'Neal and his estranged wife Shaunie back together?

The two shared a table and posed for a picture together at Ali's formal affair. Also, spies for the New York Post caught the pair in Arizona "strolling at the Wildlife World Zoo last weekend."

Shaq filed for divorce from his wife in 2007, claiming she was "secretive about her assets," but the Post says sources in Phoenix claim the duo has reconciled and may get back together.