Watch videos & listen free to Christina Grimmie: Liar Liar, Advice & more, plus 47 pictures. Christina Grimmie, known on YouTube as zeldaxlove64, is a pianist and singer known for covers of hit songs by artists such as Demi Lovato, Selena Gomez, Christina Aguilera, Miley Cyrus and Justin Bieber. Grimmie is best known for her video with Sam Tsui, covering Nelly’s "Just a Dream", which has had over 27 million views as of June 12, 2011. She had over 17 million views on her channel as of June 2011, which made her the 7th most subscribed musician on YouTube of all time at that point… She also was placed within the top 5 of the MyYoutube competition, along with Selena Gomez, Rihanna, Nicki Minaj and Justin Bieber. Discover more music, concerts, videos, and pictures with the largest catalogue online at Last.fm.