Children of American pop icon Michael Jackson made appearances Saturday at Michael Forever: The Tribute Concert at the Millennium Stadium in Cardiff, Wales.

We're very happy to be here on this special night to honor our father, said Paris, Jackson's 13-year-old daughter. Paris -- along with brothers Prince, 14, and Michael Joseph Jr. (also known as Blanket), 9 -- appeared briefly onstage, reported The Associated Press.

The Michael Forever show has stirred controversy. Many of his fans and some of his family members criticized the timing of the show because it took place while a Los Angeles court is engaged with the involuntary-manslaughter trial of his personal physician. Once the show started, however, all those criticisms appeared to be forgotten, and the whole event seemed to be a true tribute to the musical genius.

Musical stars -- Christina Aguilera, Gladys Knight, and Cee Lo Green among them -- performed Jackson's songs. The selection of songs covered those from his childhood, when he was one of the Jackson 5, and those from his solo albums, such as Thriller and Bad.

Leona Lewis sang I'll Be There, and Beyonce sang I Wanna Be Where You Are. In addition, Jamie Foxx covered Rock With You, Knight did Gone Too Soon, and Aguilera sang Charlie Chaplin's Smile. The four-hour show closed with Don't Stop Til' You Get Enough, delivered by an ensemble cast.

Jackson family members -- brothers Tito, Marlon, and Jackie, as well as sister La Toya -- also performed at the event. However, sister Janet and brothers Jermaine and Randy stayed away because they believed the timing of the concert was inappropriate.