Dionne Warwick's unofficial concert to celebrate Barack Obama's inauguration has reportedly been canceled due to low ticket sales.

The legendary singer was due to headline the American Music Inaugural Ball at the Wardman Park Marriott Hotel in Washington, D.C. on Tuesday night to commemorate the Democrat's official assent to the White House.

The event - which also featured an Urban Ball, headlined by rap stars Ludacris and T-Pain - has been called off after the $450 tickets failed to sell out, according to TMZ.com.

(This news article provided by World Entertainment News Network)