Yüyi the Mermaid is a fictional mermaid, who plays as an alter-ego to Lady Gaga. Gaga first performed as Yuyi when she sang "The Edge of Glory" on Le Grand Journal. She again performed as Yuyi while performing "Yoü and I" in Sydney, Australia as a part of the Gaga Live at Sydney Monster Hall. She used a wheelchair to keep herself "mobile" on stage since she wore a mermaid tail. Gaga tweeted about Yuyi saying, "A reincarnation of my birth+artistic spirit. In incubation, awaiting a human lover to save her. YUYI THE MERMAID."