SARNIA, Ont. - Her Fergalicious ways ruled a balmy Bayfest last night.

Fergie, the self-made Duchess of Pop, reminiscent of Madonna for her sex appeal, free ways and determination to be a star, provided the crowd of about 14,000 at Centennial Park, with a good Wednesday night party.

With four days left of a jam-packed Bayfest, Fergie (Stacy Ann Ferguson) proved a happening hip-hop/pop act to warmup the crowd for rock and country bands following this week, such as Motley Crue, the Black Crowes and Rascall Flatts.

She came on stage with white jeans and a white jacket, paired with red running shoes and belt.

After the third song, Clumsy, a hit from her debut album The Duchess, Fergie had removed her jacket.

"It's getting kinda hot and I just want to show you some things," she teased and the crowd loved it.

"She's hot. She makes my (butt) move," said Jennifer Doyle of Windsor.

Fergie also made her butt move all over the place. A little more singing and a little less shaking would have been more impressive, though.

She pulled off some nice sounds, such as Big Girls Don't Cry, which received the best response from the crowd, who sang along.

But Barracuda, which she covered for Shrek the Third, would have more appropriately been called Shriek the Third last night.

The crowd was younger than past Bayfest concerts and more female than male.

Doyle brought her eight-year-old niece with her and there were many other children grooving to the show.

Fergie gained international attention in 2003 when she became lead female vocals for The Black Eyed Peas. She performed some of their songs last night, including Where is the Love.

The band's appeal skyrocketed after Fergie joined and they won Grammy awards in 2005 and 2007.

When she decided to go solo, nobody predicted the success she would have, though.

The Duchess quickly gave her six hit singles: Fergalicious, London Bridge, Glamorous, Big Girls Don't Cry, Clumsy and Finally.

Her London Bridge number last night involved the appearance of two dancers dressed as Buckingham Palace guards, who she slithered all over.

But she didn't forget that there were a lot of kids in the audience and parents who drove them.

"Thanks moms, dads, everybody. We all love you."

Opening for Fergie last night was Saidat Vandenberg of St. Thomas. Fergie's management approved of the hip-hop singer's appearance.

After the show, Saidat was handing out her Music, Movement and Motivation CD, which she released last year, and signing autographs.

Her dancers, one from Armenia and two from Trinidad and Tobago, and male backup singers, were all keeping their fingers crossed they'd meet Fergie.

Saidat held her hands up in prayer.

"We're really hoping."

This year's Bayfest -- the 10th -- is providing six days of entertainment. New Jersey rockers Bon Jovi opened the fest last Sunday, attracting nearly 20,000 to the park.

Organizer Michele Stokley spent the last four years trying to snag the hot band for her festival.

"A lot of times we got so, so close, but something always came up at the last minute," she said.

She said the Bon Jovi concert was a huge success. "They were excellent to work with and it was a high-energy show."