A star-studded list of entertainers gathered together over the weekend to honor Muhammad Ali's 70th birthday.  See pics of Kelly Rowland, John Legend and Stevie Wonder inside.....

Over the weekend, Kelly Rowland attended The Keep Memory Alive Foundation's "Power of Love Gala" celebrating Muhammad Ali's 70th birthday.

The event was held at the MGM Grand Garden Arena in Las Vegas, Nevada to benefit the Cleveland Clinic Lou Ruvo Center for Brain Health and the Muhammad Ali Center.

Kelly Rowland was clearly the belle of the ball (going through three outfit changes) as she performed a few of her hits along with a tribute to both Whitney and Mr. Ali "The Greatest Love Of All."

Kelly's best look was this ornate, metallic gown by Jack Guisso from his 2012 couture collection.  

Music icon Stevie Wonder also played a few songs for the boxing great.

He and Kelly also sang "The Greatest Love Of All" together.

Snoop Dogg wore a beige vest with a picture of the boxing legend painted on the front. 

LL Cool J fittingly hit the stage and performed "Mama Said Knock You Out."

"The Voice" judge Cee-Lo Green also brought his brand of flair to the gala.

A very dapper John Legend also performed and later posed with actor Brad Garrett.

Only Lenny Kravitz can make a plain scarf and jeans combo look sexy.

Diddy also had a few words during the show.

Meanwhile, singer NeYo served as one of the presenters.

Samuel L. Jackson attended with his wife LaTanya Richardson.

Boxing icon Muhammad Ali was presented his honor by wife Lonnie Ali and Diddy.

Photos via Ethan Miller/Getty Images North America