Britney Spears was a nervous wreck during her first live show of 'The X Factor' USA.

The 30-year-old singer - who sits on the judging panel alongside Simon Cowell, Demi Lovato and LA Reid - was very nervous during last week's debut live shows because she is out of her element but her father Jamie believes she will improve.

He told gossip website TMZ.com: ''You know Britney is not one for talking in public like that. I think she was very nervous the first night.

''Last night (01.11.12) she was a lot better and on top of her game and I would say by next week, it's just something new, it's not a microphone, it's not talking on stage, so she is out of her element and it's same as when we were doing auditions, we had a slow start and a very strong finish. Next week is going to be better and we're getting better and better every week.''

The 'Toxic' singer's father also opened up about their recent victory against SAM LUTFI, who attempted to sue the mother-of-two and her parents for breach of contract, defamation and battery but his case was thrown out of court on Thursday (01.11.12), and Jamie said he hopes they can now move on with their lives.

He said: ''Yes I hope it's good riddance of that but I'm going to take one day at a time.''

Britney's protective father declined to go into further details about Sam Lutfi's influence on his daughter at the time of her public meltdown in 2008, during which she was involuntarily committed to a psychiatric hospital and lost custody of her two sons, but said ''maybe one day I will''.

He added: ''I am so relieved this is over with for our family and we can put this behind us and move forward. I am just very grateful this thing is over with.''