Judith Hill, a performer that was to be on Michael Jackson's upcoming tour, talks to Mary Hart on the ET stage about singing at his memorial service and the emotions that came with losing the music icon.

Judith says the performance of Jackson's "We Are the World" at the King of Pop's memorial service on Tuesday was part of his scheduled London tour.

She says the U.K. concert series was to include a duet with her and Jackson singing "I Just Can't Stop Loving You."

Judith tells Mary preparing for the memorial was hard because she is still grieving. For more with Judith Hill, watch tonight's ET.