Singer Selena Gomez performs onstage at the 3rd Annual "Concert for Hope" presented by Staples at the Gibson Amphitheatre on March 20, 2011 in Universal City, California. (Getty Images)more pics » 
Selena Gomez (Getty Images) Disney star Selena Gomez performed at the Concert for Hope in Los Angeles on Sunday night. The star, who just came out with her new single "Who Says," contributed to the yearly fundraiser that raised nearly $ 1 million in donations for cancer research.Gomez is getting ready for her upcoming tour, and she has discussed making a tribute to one of her childhood idols, Britney Spears.
"We haven't announced anything yet, but I'm kind of creatively thinking of what I want," she told MTV News. "We are working on a few cover songs. We are working on a Britney tribute, which I'm so stoked about, 'cause I love Britney. I was like, 'I have to do it.' I wanna do a mash-up of all her songs and just go for it."
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