When the chat show host asked Justin "should I get a bridesmaid dress now or
not?", he replied: "You know what? Go ahead and reserve one.
"The only thing is you'll have to stay the same size for the next 15 years."
Justin also dismissed the constant rumours surrounding his and Cameron's
relationship.
He explained: "The funny thing is that one week we're getting married, one
week we have broken up. I can't keep up with it.
"We're not engaged. She hasn't given me a ring. I've waited for her to get
down on one knee and ask."
Meanwhile, Justin has revealed he can't make love if music is playing in the
background because he finds it too distracting.
He said: "I have trouble having sex to music because I'll start picking out
the chords."

In other news, Justin Timberlake knocked Beyonce and Jay-Z off the top of the British pop charts on Sunday to claim his first solo UK number one with "Sexyback".
The American singer's first single in three years has already topped the charts in the United States.

While Timberlake hit number one in 2003 as a guest singer with U.S. band Black Eyed Peas on "Where is the Love?", he had never reached the top as a solo artist.

Speaking of , rockers Kasabian have attacked Justin Timberlake branding him "a midget with whiskers who is trying to be black".