Judith Hill, the mystery singer who performed at Michael Jackson‘s public memorial service this week, is on the ET stage to perform a special concert!

Hill, who sang "We Are the World" at Tuesday’s memorial, was a performer on Jackson’s cancelled London concerts, and was set to perform "I Just Can’t Stop Loving You" with the King of Pop.

She tells our own Mary Hart that preparing for Tuesday’s performance was incredibly hard because she was still grieving and getting over the shock of Michael’s sudden death: "There were so many emotions going on," she says. "I just started welling up in tears and there was a lot of really hard times, but beautiful too."

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