Ne-Yo is a massive fan of Duffy and Amy Winehouse. The 'Closer' singer has written songs for several big music stars including, Leona Lewis, John Legend, Estelle, Usher and Pussycat Dolls, and hasn't ruled out collaborating with the British duo.

He said: "LA Reid introduced me to Duffy's record. I really love her voice. You guys have a lot of talent."

Pop star Jessica Simpson performed at Camp Pendleton for the troops Thursday night, but took some time to talk about her younger sister's wedding plans. Jessica's sister, Ashlee Simpson, is engaged to Pete Wentz of the Fall Our Boys.

Jessica performed for the troops wearing a skin-tight red top, jeans and black stiletto heels and sang songs such as "These Boots Are Made For Walkin.'" Also performing at the three-hour concert were celebrities such as Snoop Dogg, Janet Jackson, Ne-Yo and Pamela Anderson.

Ne-Yo had turned down the Spice Girls for Rihanna. The R&B star has confessed that the girl group had asked him to write them a song but he was still busy working with the "Umbrella" singer.

The 25-year-old singer says it's nothing personal; it's just that he couldn't find the time for the five girls as he was already busy with one.