Lady Gaga had to "endure a lot" during her early days of fame.
The 38-year-old pop star - whose real name is Stefani Germanotta - emerged on the music scene in the late 2000s with hits such as 'Poker Face' and 'Bad Romance' but admitted that all that success "took [her] far away" from herself and she was "hardened" by her experience, although things are very different these days.