Answer by taking a quote from the following article:

Adam Mitchel Lambert (born January 29, 1982) is an American singer, songwriter and stage actor. Since 2009, he has sold over 3 million albums and 5 million singles worldwide. Lambert rose to fame in 2009 after finishing as runner-up on the eighth season of American Idol. Later that year, he released his debut album, For Your Entertainment, which debuted at number three on the U.S. Billboard 200.

Critics, celebrities and colleagues have been outspoken in their praise for Lambert's vocal command. Kathie Bretches-Urban, co-founder of Metropolitan Educational Theatre Network (now MET2) where Lambert performed as a youth, said "He has invested his entire life in music and performing ... He'd just come out onstage, and it popped". Record producer Rob Cavallo once described Lambert as having an unlimited range, and able to sing every note on a guitar from the lowest to the highest. In a March 2012 interview, rock artist Meat Loaf rated Lambert's voice in the company of only two others, Whitney Houston and Aretha Franklin, based on "that jet pack quality to their voice that just lets it take off." Lambert's total recorded vocal range spans from bass E to B flat above tenor high C (E2 - B5), giving him three octaves and six semitones.  In 2011, when he took the stage at the MTV Europe Music Awards, honoree Queen guitarist Brian May noted that Lambert's voice has "sensitivity, depth, maturity, and awesome range and power which will make jaws drop"; while Roger Taylor added that Lambert had "the best range I've ever heard" in a BBC interview in 2012. Pharrell Williams, after collaborating with Lambert on his Trespassing album, commented, "This kid has a voice like a siren - there's no guys singing in that Steve Winwood-Peter Cetera range."  In October 2012, British tabloid the Sunday Mirror reported that Lambert had insured his voice for $48 million. A source told the newspaper: "Insurance for stars is a big deal in the US and Adam's voice is his bacon."

Did he perform on the voice or take stage on any other show?
In 2011, when he took the stage at the MTV Europe Music Awards,