Kim Kardashian West says her "biggest fear" was dancing next to Beyonce.

Kim Kardashian West

Kim Kardashian West

The 'Keeping Up With The Kardashians' star joined her husband Kanye West when he toured with Jay Z in 2011 and admits she was worried about how her dancing skills would stack up against the 'Crazy In Love' hitmaker.

She said: "My biggest fear was during Watch the Throne that if I sit next to Beyoncé, she dances and she's up, like, you know. So, the last night of the tour, she came to dressing room and was like, 'Hey, do you want to sit together?' Then, she wanted to go in the mosh pit and I was like, 'What do we do in the mosh pit?' She's like, 'Dance! Just let loose. Just dance!' And I was like, 'My life is over!'"

And the 35-year-old television personality - who has North, three, and Saint, eight months, with the 'Only One' rapper - also admitted her dislike for dancing caused one of the "biggest fights" the couple ever had.

Speaking to her sister Kourtney Kardashian and her close pal Malika Haqq on the family's E! reality show, she said: "Like, it was our biggest fight that I don't dance at Kanye's concerts. I did not dance on Dancing With the Stars. Like, I did not dance!"

And just because Kim isn't a keen dancer, she still manages to keep fit by working out.

She said: "I think dieting is so important to weight loss, whereas, I didn't really ever think that before.

"I thought, 'Oh, I can work out, I can just eat whatever I want.' But you have to work out all the time."