Nicole Scherzinger crashed Kate Hudson's birthday party.

The singer enjoys letting her hair down by meeting up with her girlfriends and having a good time. Sometimes they'll enjoy a chilled night in, but the 35-year-old admitted their nights can be unpredictable.

"Sometimes I'll cook for my friends and we'll drink vino and do girl talk and light candles and laugh all night," she smiled to the British edition of OK! magazine.

"Other times we'll go and have a lovely dinner, and then maybe go to a club afterwards or a bar and just have a laugh. We went to a lounge for a drink on the way home recently and ended up crashing Kate Hudson's birthday party. That was fun!"

Nicole served as a judge on The X Factor UK in 2012 and 2013 and during last year's show she was often spotted enjoying boozy nights out. She's now too aware of her health to overdo the alcohol.

"Well, I don't drink that much actually because I'm too focused on working out," she said. "Most nights I'm doing hot yoga at 10pm and I don't want to go and drink after that at 11!"

Despite spending much of her time in the gym, the gorgeous brunette still makes time for some fun. She's been spotted out with on/off boyfriend Lewis Hamilton in Cannes and Monaco, looking fabulous in an array of designer dresses.

"I actually went out the other night in Monaco, so I was up on that dancefloor!" she grinned. "The right music will make any girl get up. If I'm getting ready for a night out with the girls I'll always play my music, or Beyoncé's new album."