Photo: Pregnant Kate Hudson sings with Adam Lambert

A pregnant Kate Hudson took to the mic with Adam Lambert, Jake Shears and Fergie.

Kate, Adam, Fergie and her hubby Josh Duhamel got together for a dinner with Scissor Sisters singer Jake.

The party was held and hosted by Chrome Hearts Factory on Sunday in Hollywood.

It was after dinner when the gang got together for a sing-a-long.

Kate is expecting a baby with Muse front-man Matt Bellamy.

Click here for photos.