DETROIT (WWJ) – A surprise appearance by Motown star Diana Ross has helped Indianapolis celebrate the opening of its new downtown Marriott Hotel. 

Ross performed a number of her iconic songs Saturday, including “I’m Coming Out,” “Baby Love,” “Stop! In the Name of Love” and “Love Child.”

The performance was a secret to most of the 1,000 partiers until show time.

The 33-floor, 1,005-room hotel is the last phase of a $450 million Marriott Place complex.