Selena Gomez's split from Justin Bieber helped her to turn her career around.

The pop starlet felt she had stopped being challenged musically before she was 20 but her painful breakup from the 'Never Say Never' singer in January 2013 motivated her to re-evaluate and come back with pop hit 'Come & Get It'.

She told Seventeen magazine: ''I questioned the way I looked, acted, sang, and wrote. I started becoming very stale with my music, and I realised that I was doing things for other people.

''Then I turned 20, went through a really bad breakup, and realised I needed to pick up everything.

''I needed to have 'Come & Get It' be amazing. I wanted it all to be me. I was tired of feeling defeated. All this time, I was so p****d trying to figure out why I felt like such an underdog, and I finally realised I just wasn't ready. I'm glad it's taken me this long to get where I am because now I am ready for it.''

Selena reunited with Justin, 19, earlier this month - a year after the initially separated - but before their romance gets too serious again, she is urging him to attend anger management classes, following a police raid on his home in Calabasas, California on Tuesday (14.01.14).

A source said: ''She's told Justin he has to mend his ways if they are to start seeing each other regularly again.

''She just wants some pleases [and] thank yous, as well as some good behaviour if things are to get serious again.

''She has told Justin he needs help with anger management and that he should book classes.''