Madonna has hinted that she may team up with special guests at Radio 1's Big Weekend.
The superstar, who will headline the Main Stage on Saturday, said that Pharrell Williams or Justin Timberlake could appear.
She said: "I don't know if Justin is going to be there or not. So stay tuned. Maybe Pharrell will turn up if I'm lucky."
Both artists feature on her current Number One album Hard Candy.
The singer will play a 40 minute set of old and new hits for her first ever UK festival performance at the two day festival at Mote Park in Maidstone, Kent.
"I have never been to the Big Weekend before. I hear it's fun, is it crazy?" she said.
The singer also revealed that she will be bringing her family along for her performance at the Big Weekend.
"I will probably bring Lourdes with me and maybe Roco," she said. "They always come to the rehearsals but they're kind of over the whole stage show thing. They like to skateboard around."
Justin Timberlake recently joined Madonna onstage to perform 4 Minutes during a secret show in New York.
Speaking about her time in the studio with Timberlake, Timbaland and Pharrell, she said: "It was a little awkward at first because you don't really know them and you feel a little intimidated. Justin admitted to me the other day that he felt the same.
"As for Timbaland I experienced both sides of him. I experienced him being very up and jovial and communicative.
"Then other times he would come in put his headphones on, and not speak to anyone. So you'd be thinking 'OK he's in his own world'.
"So we'd go off and work with other musicians and Justin and I would be writing words together and it seemed like Timbaland wasn't paying attention.
"But he'd take off his headphones and go, 'No' or he'd turn around and put his thumb up. He's quite unique, you think he's not paying attention but he is."
More than 500,000 people registered for tickets for the two-day event this year which also feature performances from Usher, The Kooks, Editors and Duffy.
Across the two days and four stages, fans will enjoy more than 50 UK and international artists alongside DJs.