JUSTIN TIMBERLAKE's former 'N Sync bandmate LANCE BASS is convinced the Sexyback singer and his girlfriend JESSICA BIEL will wed "pretty soon".

The singer-turned-reality TV star has high hopes for the loved-up couple and can't wait to get an invite to their big day.

Lance says, "I think they're both very, very family-oriented people, so I definitely see them getting married pretty soon."

And Justin's grandma, Sadie Bomar, agrees the couple makes the perfect pair.

She says: "Jessica is a sweet girl and they really enjoy each other's company."