Fifi Geldof has paid tribute to her late sister Peaches.

Fifi, 31, shared an old family picture of herself and Peaches as children and captioned it: "My beautiful baby sister ... Gone but never forgotten. I love you, Peaches x (sic)"

Fifi and Peaches are the daughters of Boomtown Rats legend Bob and late model Paula Yates. They have a younger sister, Pixie, 23, and a half-sister, Tiger Lily, who is Paula's daughter with Michael Hutchence.

Meanwhile, more celebrity tributes have poured in for Peaches, who is survived by her two sons, Astala and Phaedra, with her husband Thomas Cohen.

'Royals' singer Lorde, 17, hailed Peaches qualities as a person, writing on Twitter: "You were a sparkling, lovely person who showed me such kindness. rest easy, peaches (sic)"

Music mogul Simon Cowell, 54, shared his condolences, writing: "The few times I met Peaches she was a sweet, funny warm person. Much love to her family she has left behind."

Paris Hilton said: "So sad to hear the news about Peaches Geldof. She was such a beautiful & special soul. My thoughts & prayers go out to her family. RIP (sic)"

Tributes have poured in from around the world, including the music industry and even Hollywood.

Actress Susan Sarandon wrote: "No words can express any comfort at the loss of a child and mother as beautiful as Peaches Geldof. God bless."

Boy George was left stunned by the news of his pal and offered his condolences to Peaches' father.

He wrote: "Poor sweet Peaches Geldof. We spoke only a month ago and she looked like an angel. This is truly sad. Poor Bob! R.I.P (sic)"