Pink Joins Ex to Honor His Fallen Brother

08/18/2008 at 04:05 PM EDT

During Carey Hart's time of grief, his estranged wife, Pink, is standing by his side.

The rocker joined Hart and a group of friends in Las Vegas Friday night at Hard Rock Hotel's Wasted Space (which Hart owns), to "celebrate the life" of Hart's brother Anthony who died Aug. 9 in a motorcycle accident in Connecticut. Earlier in the evening, friends and family attended the funeral for the professional motocross racer.

Sources say that Pink took to the bar's stage at Wasted Space to perform a cover of 4 Non Blondes "What's Up", dedicating it to Hart's fallen brother. She later sang "Bobby McGee", and Hart joined her on stage to toast his brother.

"It was very sweet," an onlooker said. "After the funeral, they turned it into a giant party. Everyone was very upset at the funeral, but they turned it into a celebration of life at the bar. Everyone seemed very moved."
– Mark Gray