Lloyd Edward Elwyn Robertson is a Canadian musician, best known as the lead singer, guitarist, and songwriter of the band Barenaked Ladies. He, along with former member Steven Page, founded the group in 1988. As of Page's departure in 2009, Robertson and bassist Jim Creeggan are the only remaining original members of the band.

Barenaked Ladies (BNL) is a Canadian rock band formed in 1988 in the Toronto suburb of Scarborough, Ontario. The band developed a following in Canada, with their self-titled 1991 cassette becoming the first independent release to be certified gold in Canada. They reached mainstream success in Canada when their debut with Reprise Records, Gordon, featuring the singles "If I Had $1000000" and "Brian Wilson", was released in 1992. The band's popularity subsequently spread into the US, beginning with versions of "Brian Wilson" and "The Old Apartment" off their 1996 live album Rock Spectacle, followed by their fourth studio album Stunt, their breakout success in 1998. The album featured their highest-charting hit, "One Week", as well as "It's All Been Done" and "Call and Answer". Their fifth album, Maroon, featuring the lead single "Pinch Me", also charted highly. In the 2010s the band became well-known for creating and performing the theme song for the sitcom The Big Bang Theory.