The Jacksons Rock Morocco, Pay Tribute to Michael

Jackie, Tito, Jermaine, and Marlon Jackson recently joined forces on stage in Morocco to pay tribute to their fallen brother in song. Only ET was there as the fab four reminisced about their brother Michael and rocked out for a huge gathering of fans.

Pics: Remembering Michael Jackson

Before a crowd of an estimated 150,000 people gathered for the Mawazine Festival, the Jackson 4 revived some of Michael's greatest hits (such as Wanna Be Starting Something and Rock With You)—a feat the performers described as difficult, but necessary.

Related: Michael Jackson's Wrongful Death Trial Begins

"It is a healing," said Jermaine of the big show prior to hitting the stage. "It's something that we feel that's needed because of the passing our brother so we felt that we should go out and play the music and feel good."

Click the video above for a look at the brothers' emotional reunion and milestone concert.