Cheryl Tweedy says her son Bear is ''the reason I get up in the morning'' and praised her son as her ''world''.

The 36-year-old singer raises Bear, two, with her former partner Liam Payne, and praised her child as her ''world'' as she appeared on Children In Need on Friday.

She said: ''My son means the world to me, he's the reason I get up in the morning. I can't imagine ever having to be without him.''

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The former Girls Aloud star recently revealed she had an ''irrational'' fear her son would be swapped at birth.

The Fight for this Love singer admitted she refused to be parted from her baby while they were still in hospital after he was born because she was convinced she'd be given the wrong child back.

''When I had him, first of all I wouldn't let the doctors take him out of the room. I read this story about two girls being swapped at birth and it was playing on my mind. I was so irrational...I didn't want anyone to take him," she said.

Tweedy also explained how her son's unusual moniker came from a nickname he was given while they were in hospital as she'd initially struggled to come up with a unique name.

 ''When I was in the hospital, he used to make these noises. We had specialists coming in to see what was going on, he was breathing like - quite cute but nothing worrisome," she explained.

''It was just him. The midwife used to come in and say: 'How's the little bear?' I didn't have the name prior...