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Clive Davis‘ annual party, held the Saturday night before the Grammy Awards, is back on this evening following the shocking death of Whitney Houston.

“It’s still on,” a rep for the party tells JustJared.com.

“They are trying to pull together a memorial of sorts for grieving,” adds another source. “But they are trying to turn away as many people as possible.”

Whitney was to attend the party at the Beverly Hilton Hotel this evening. She was found unresponsive in her hotel room this afternoon and was later pronounced dead at the age of 48.

Celebrities have taken to Twitter to post tributes to the late singer Whitney Houston, who passed away at the age of 48 on Saturday (February 11).

Mariah Carey (@MariahCarey): “Heartbroken and in tears over the shocking death of my friend, the incomparable Ms. Whitney Houston. My heartfelt condolences to Whitney’s family and to all her millions of fans throughout the world. She will never be forgotten as one of the greatest voices to ever grace the earth.”

Katy Perry (@KatyPerry): “So devastating. We will always love you Whitney, R.I.P.”

Justin Bieber (@JustinBieber): “just heard the news. so crazy. One of the GREATEST VOICES EVER just passed. RIP Whitney Houston. My prayers go out to her friends and family.”

Christina Aguilera (@TheRealXTina): “We have lost another legend. Love and prayers to Whitney’s family. She will be missed.”

Nicki Minaj (@NickiMinaj): “Jesus Christ, not Whitney Houston. Greatest of all time.”

Lea Michele (@MsLeaMichele): “I’m speechless. Such sad news about Whitney Houston.”‘

Serena Williams (@serenawilliams): “Wow just wow. This has ruined my whole day. #Iwillalwaysloveyou. #OneMomentInTime has propelled me to many of my grand slams victories.”

LeAnn Rimes (@leannrimes): “Whitney Houston was the first cd I ever bought. She had a God given gift. Hopefully, she’s singing with angels now.”

Chloe Moretz (@ChloeGMoretz): “Omg.. whitney houston died..we’ve lost another amazing singer.”

Rihanna (@Rihanna): “No words! Just tears #DearWhitney”

Matthew Morrison (@Matt_Morrison): “I’m very sad to hear about the passing of Whitney Houston, may she rest in peace.”

Jaime King (@Jaime_King): “God bless Whitney Houston and her family. May she rest in peace.”

Whitney Houston has passed away at the age of 48, sources confirm to JustJared.com.

The singer passed away on Saturday (February 11). She was expected to show up at a studio for a photo shoot in the afternoon and to attend Clive Davis‘ Annual Grammy Party in the evening, JustJared.com can exclusively reveal.

Whitney was the first female artist to ever debut at number one on the Billboard charts and she is considered one of the world’s best-selling female artists with over 200 million albums sold worldwide. After struggling with addiction, Whitney returned to the music scene in 2009 with her album I Look to You.

Later this year, Whitney‘s new film Sparkle will be released into theaters. Check out a brand new still from the film that was released last week.

Whitney is survived by her daughter Bobbi Kristina, whom she had with ex-husband Bobby Brown.

Check out this brand new shot of Whitney Houston and Jordin Sparks from their upcoming movie, Sparkle.

The film, inspired by the story of The Supremes, is a remake of the 1976 film of the same name. Sparkle tells the story of 3 sisters forming a successful singing group and dealing with the obstacles that come along with fame.

R. Kelly contributed new songs that will be added to the original score, written by Curtis Mayfield.

Also starring: Gossip Girl‘s Tika Sumpter, Omari Hardwick, and Cee-Lo Green.

Sparkle is set to be released in August.

• Whitney Houston is in negotiations to star in Sparkle, a remake of a 70s music-themed drama – Huffington Post
• What’s Ashley Greene‘s skin secret? – Just Jared Jr
• Why does the new Playboy issue only cost 60 cents? – FoxNews
• Don’t mess with Terrence Howard! – DListed
• Erin Heatherton is seriously sexy – Hollywood Tuna
• What would the Republican candidates bring to the White House if elected? – Towleroad
• Ali Landry is one proud mama to be – Celebuzz
• Paul Wesley chats about his fangs on Regis & Kelly – ASL

Whitney Houston recently entered an out-patient treatment program, JustJared.com can confirm.

“We can confirm that Whitney Houston is currently in an out-patient rehab program for drug and alcohol treatment,” her reps reveals of the 47-year-old singer. “Whitney voluntarily entered the program to support her long-standing recovery process.”

Whitney has battled substance abuse in the past but declared herself clean in 2009 when she released a comeback album. Last week in Los Angeles, she performed with Chaka Khan during a Prince concert.

Get well soon, Whitney!

Jennifer Hudson shows off her amazing figure at Keep A Child Alive’s 7th annual Black Ball at NYC’s Hammerstein Ballroom on Thursday (September 30).

The 29-year-old singer and Oscar winner recently revealed she’s lost an additional 20 lbs. – slimming down from a size 16 to a 6 – since starting the Weight Watchers program earlier this year.

At the bash, Jennifer met up with Whitney Houston and Alicia Keys, who flaunted her baby bump on the red carpet.

Beyonce and Jay-Z also attended the event, which raised over $2.4 million for lifesaving AIDS treatment, care and support to children and families affected by HIV/AIDS in Africa and India.