Bobbi Kristina Brown, Rihanna among stars paying tribute on Whitney Houston's 51st birthday

Proving that her spirit continues to live on, music legend Whitney Houston was the subject of numerous tributes on her birthday Saturday.

Whitney's daughter Bobbi Kristina took to Twitter to honor her mother, who died tragically in 2012, with a photo of a birthday cake topped with lit candles. The caption read, "#HappyBirthdaymommy!#HappyBirthdayWhitney!#AllAugustAllWhitney #iloveyou."

Prior to posting the photo, Bobbi Kristina also tweeted another loving message to her mother. "HappyHappyHappyBirthday2my amazingMommy! 2day is YOUR day, Iloveulady," the message read.

Other celebrities also paid homage to the late songstress on her special day. According to AceShowbiz, Rihanna wore a t-shirt with Houston's image printed in a graphic on the shirt. Riri was photographed wearing the shirt while leaving a Venice, Calif. restaurant.

Whitney Houston would have been 51 on Saturday Aug. 9. Houston, whose songs included hits such as "I Will Always Love You," and "How Will I Know" passed away suddenly on February 11, 2012 at the age of 48.

Photo Courtesy of:Tina Kaawaloa INFevents.com

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