Electro-pop duo Sofi Tukker dance it out with the TED audience in a performance of their upbeat, rhythmic song "Awoo," featuring Betta Lemme.

Violinist Natalie MacMaster and TED Musical Director Thomas Dolby play Dolby's original song "Blue Is a River" in this ethereal duet -- with a little dancing.

Singer, songwriter and actress Sara Ramirez is a woman of many talents. Joined by Michael Pemberton on guitar, Ramirez sings of opportunity, wisdom and the highs and lows of life in this live performance of her song, "Rollercoaster."

Singer/songwriter Eddi Reader performs "Kiteflyer's Hill," a tender look back at a lost love. With Thomas Dolby on piano.

Inspired by Aung San Suu Kyi's call to action, "If you're feeling helpless, help someone," Morley composed this song. She sings it at TEDxWomen in her gorgeous, warm voice.

Nora York gives a stunning performance of her song "What I Want," with Jamie Lawrence (keyboards), Steve Tarshis (guitar) and Arthur Kell (bass).

Jackson Browne plays a song about being on the ocean ... or really, being anywhere among passionate friends. (He started writing this song aboard Mission Blue Voyage, a Sylvia Earle-inspired conference about saving the ocean.) "If I could be anywhere," he sings, "anywhere right now, I would be here."

Caroline Lavelle plays the cello like a sorceress casting a spell, occasionally hiding behind her wild mane of blond hair as she sings of pastoral themes. She performs "Farther than the Sun," backed by Thomas Dolby on keyboards.

Usman Riaz is a 21-year-old whiz at the percussive guitar, a style he learned to play by watching his heroes on YouTube. The TED Fellow plays onstage at TEDGlobal 2012 -- followed by a jawdropping solo from the master of percussive guitar, Preston Reed. And watch these two guitarists take on a very spur-of-the-moment improv.

Using sleight-of-hand techniques and charming storytelling, illusionist Marco Tempest brings a jaunty stick figure to life onstage at TEDGlobal.