Beyonce Knowles, Kelly Rowland and Michelle Williams from Destiny's Child pose for photos after being honoured with the 2,305th star on the Hollywood Walk of Fame Hollywood, California on March 28, 2006. (Dimitri Halkidis/WENN.COM) Destiny's Child to perform medley

R&B singer Michelle Williams is keeping fans guessing about rumours of a Destiny's Child reunion at Sunday's Super Bowl half-time show.

Reports suggest headliner Beyonce will bring her pals Kelly Rowland and Williams onstage during her set at the Mercedes-Benz Superdome in New Orleans, Louisiana to perform a special three-song medley, including renditions of their hits Bills, Bills, Bills and Survivor.

Williams has since insisted she's too busy and focused on her appearance in a new touring production of musical Fela! to fly to New Orleans for the get together - but conflicting interviews suggest she's not quite telling the whole truth.

In a recent chat with WRUG Media, she said, "I'm going to be in the musical Fela!. I hate to disappoint the people and tell them that it (the reunion report) is not true. I'm so sorry. I'm so sorry."

However, in another chat with online blog ThatGrapeJuice.net, Williams tries to laugh off the claims when asked directly if the Super Bowl reunion reports are false. She coyly replied, "I can't say that. I don't know where it (the rumour) came from."

Williams is due to kick off the touring production of Fela! in Washington, D.C. on Tuesday, but interestingly enough, the official ticketing website notes that the singer/actress will not be appearing in the play from January 31 through to February 3 - the same night as the Super Bowl.

Destiny's Child have not performed in public together since 2006.