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18 May 2012, 11:40
The two music stars take to Twitter following news of the disco legends death aged 63.
Rihanna and Kelly Rowland are among the musicians who have paid tribute to Donna Summer.
The disco legend, whose hits included 'I Feel Love' and 'Hot Stuff', is reports to have died following a battle with cancer. She was 63.
Rihanna appeared shocked by news of Summer's death, and then re-tweeted a fan who had written: "RIP Donna Summer, Queen of Disco!"
Destiny's Child star Kelly Rowland also took to Twitter to express her sadness about the singer's death.
She wrote: "Icon! Legend! Her voice! Her spirit! Rest In peace, you truly inspired me."
In a statement, Summer's family said they were "at peace celebrating her extraordinary life and her continued legacy".
Listen to Donna Summer's 'Love To Love You Baby' below:
Tributes have also been paid by US president Barack Obama, Sir Elton John and Mary J Blige.
Donna Summer was born on New Year's Eve 1948 in Boston and began singing in church before launching her music career in the late 1960s.
Her music career began to blossom in the 1970s thanks to singles including 'Love To Love You Baby', 'Last Dance' and the disco classic 'I Feel Love'.