About a year ago, Mariah Carey sang a touching rendition of "I'll Be There" at the Los Angeles memorial for Michael Jackson.
On Friday -- the one-year anniversary of Jackson's death at age 50 -- Carey remembered her friend on Twitter.
"Watching 'You are not alone'..Love and Prayers to MJ 'King of Pop.' You will be remembered forever. We miss you," she wrote.
Carey performed with Jackson in concert several times, and said she was "heartbroken" after hearing he'd died. After singing at his memorial, she Twittered, "I could barely keep myself from crying."
PHOTOS: Michael and his kids
Dancer Cheryl Burke told UsMagazine.com at the Roll Your Way Into A Sweat Free Summer With Revolutionary New DeoDry event that she's still affected by Jackson's death.
"This time last year I was in New York at this time... and I was driving in a taxi down the streets and hearing all Michael Jackson music. I knew that something tragic must have happened to him," she recalled. "It's really sad because for dancers like me, I have always looked up to me and he was and still is my idol. He is really amazing and he is surely missed."
Jackson's three children, Prince, 13, Paris, 12, and Blanket, 8, spent the one-year anniversary of their father's death vacationing with their grandmother (and legal guardian), Katherine Jackson, in Hawaii.
"A year has gone by but it is still just as emotional. It's very hard sometimes," Katherine recently told Britain's The Sun. "I am happy that people are celebrating the anniversary because I know the world is missing and remembering him. But every day is a struggle – I miss him immensely."