Michelle Williams has a crush on Calvin Harris.

The former Destiny's Child star announced she was smitten with the handsome Scotsman when they teamed up in London on Tuesday (August 25, 2009) for an energetic performance of his UK top 10 hit "Ready for the Weekend."

She said: "Calvin Harris is cute! You're looking so cute Calvin! Oh isn't he cute!"

The 29-year-old beauty sang as the DJ played to hundreds of screaming fans at the J20 Mixed Up Session at the Hoxton Bar and Kitchen.

After their collaboration, Michelle admitted she thinks the track is as hot as its creator.

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She said: "I love that song. Thank you Calvin!"

The songstress - who is in the British capital city for her stint as Roxy Hart in the musical "Chicago" - went on to entertain the crowd with a medley of classic pop tracks.

Michelle writhed about the stage with two muscle-bound male backing dancers as she performed Diana Ross' "I'm Coming Out," The Partridge Family's "I Think I Love You" and the Whitney Houston classic "I'm Every Woman."

Michelle ended her intimate performance with a well-received version of her song "We Break the Dawn."

Afterwards, she thanked the crowd for their participation before fashion designer-turned-DJ Henry Holland played a set on the decks.

She quipped: "Thank you, it's been an absolute pleasure... I feel like I'm giving a speech! I want to thank God and my mom and dad."

"I want to thank you from the bottom of my heart. I'm here in London until September 12 and I'm very excited to be your sexy Roxy Hart."