Mandy Moore was once left ''mortified'' by Justin Timberlake.

The 'Only Hope' hitmaker has recalled the time where she went touring with *NSYNC and the Backstreet Boys at just 15-years-old and was left embarrassed when the singer, now 34, told her she had big feet for a girl.

She said: ''I'm 15, I'm touring with this boy band at the height of their superstardom, we were all backstage... everybody was sort of conversing and somehow we were talking about feet. And he walked up and pointed at my feet and was like, 'You've got big feet for a girl!'

''I was mortified. I was a little string bean, just going through puberty, and my feet were bigger than they should have been.''

And whilst she can laugh about it now, the 30-year-old singer-and-actress has admitted she felt as though it was a ''low blow'' at the time.

She shared: ''I wanted to crawl into a hole. Not that he would ever remember that, but at that moment, man, it really was a low blow.''

But overall, Mandy has admitted the whole experience was mind-blowing.

Speaking on Hallmark Channel's Home & Family show, she added: ''I went from watching them on TRL to...signing a record deal and six months later I was on the road with them.''