Fergie is "thrilled" about her engagement to her boyfriend of three years, Josh Duhamel.

The Black Eyed Peas singer flashed her impressive diamond engagement ring during a performance at Atlantic City's Borgata Hotel Casino and Spa on Saturday.

She gushed: "I feel like the luckiest girl in the world. I'm thrilled!"

 Dedicated All That I Got to Josh, a clearly loved-up Fergie told the crowd: "This song is about loving someone for their inner beauty. I hope you all have someone like that in your lives. I do."

Fergie wants to keep her wedding plans underwraps but admits it will be hard to keep the details a secret.

She insisted: "I'm not giving any details. I think the fine points are sacred. It's just important to us. It's hard for me to stay quiet though because I have a big mouth!"

The couple announced their happy news on Boxing Day but refused to reveal if Transformers star Josh popped the question on Christmas Day.