[...]

His songwriting career got a major boost ten years ago when he worked with *NSYNC. He liked the whole group and wishes JC Chasez had a more successful solo career, but he knew Justin Timberlake would be a break-out artist. When Marx worked with one member of the group the rest of them played ping pong or talked on their cell phones with girls, except for Timberlake. He went to another room in the studio to write songs or practice the keyboard and guitar. [source]