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Madonna loves her ex-husband Sean Penn, something she has said twice to his face this year.

The actor appeared onstage at the pop star's Raising Malawi charity auction and gala during Art Basel in Miami Friday. He craweled in between her legs and slapped handcuffs on her playfully. She told the audience she would marry him again if he bid $150,000 for a necklace. He did, but was later outbid.

"I'm still in love with you," Madonna told Penn onstage, as he blushed. "Yes. In fact, I think I love you more now that we're divorced."

The two were married for four years before they divorced in 1989. It marked the first marriage for both, who have no children together.

A video posted by Madonna?? (@madonnaitalia) on

Madonna had also professed her love for Penn at his Help Haiti Home benefit gala this past January, saying, "I want to say, Sean, that I love you from the moment that I laid eyes on you and I still love you just the same. I just wish you'd stop smoking so many cigarettes."

Madonna also performed at the Raising Malawi event, singing some of her hits, such as "Don't Tell Me" and "Beautiful Stranger," as well as a cover of Britney Spears' "Toxic."

Madonna, Art Basel

Kelli Kennedy/AP/REX/Shutterstock

Ariana Grande also joined the singer onstage to dance with her and the two also briefly engaged in a double twerking session.

Celebrity guests included Chris RockCourtney Love, Paris HiltonReal Housewives of New York City star Bethenny Frankel and model Karolina Kourkova. The latter three posted on Snapchat videos of Madonna's appearances onstage.

A video posted by Ximena Caminos (@xcaminos) on

Madonna, Raising Malawi Benefit, Art Basel Miami Beach

Snapchat / Karolina Kurkova

About $7.5 million was raised at the benefit, reports said.

"Absolutely amazing!" read a message posted on Raising Malawi's Instagram page. "No amount of words can properly express our gratitude for both the people in this room, as well as those of you that have supported us from around the world. We can't wait to use the funds raised tonight to complete the #MercyJames Pediatric Surgery Unit & ICU, #malawi's first-ever!!!"

"Last Night. Was an overwhelming and resounding success!! Im am so grateful to so many people! @@raisingmalawi," Madonna wrote.