>> it's really cool! [ screaming ] in the first week alone, no strings attached sold 2.4 million copies, making it the fastest-selling album of all time. ♪ much better ♪ once you're gone despite the growing frenzy, the growing bank account, and the growing adoration of fans -- >> reporter: how much do you like 'n sync? >> a lot. a lot. a lot. those close to justin saying his feet never left the ground. >> you know, when people get this big in this business, sometimes they get a big head, and their entourages start to grow. they become in a situation where