After searching, I've found the answer to the question. "Who was the musical artist on SNL in June who sang a song which had some whistling in it. The answer is Peter Bjorn and John, the name of the album is Writer's Block, and the name of that great song is "Young folks".
Saturday Night - musical - was created in 1955.
The musical guest on Saturday Night Live August 11 was 'Beck'.
On January 12th, 2008, the musical guest on Saturday Night Live was OneRepublic.
Chris Brown appeared on Saturday Night Live as a musical guest on February 12, 2011 where he performed "Yeah 3x" and "No BS." The best resource for future hosts and musical guests is the Official Saturday Night Live website, which will show you the host and musical guest on the front page.
Taylor Swift was Saturday Night Live's musical guest on January 10, 2009, and she was both musical guest and host on November 7, 2009.
"NBC's Saturday Night"
www.saturdaynightlive.com
As of February 2014, Justin Timberlake has been on Saturday Night Live 5 times. Out of his 5 appearances as host, Timberlake acted as both host and musical guest during 3 episodes. During his most recent appearance on December 21, 2013, he was the musical guest while Jimmy Fallon hosted.
April 1, 2011 was a Friday night. Saturday Night Live comes on Saturday nights. On Saturday, April 2, 2011, Elton John was the host, and Elton John and Leon Russell were the musical guests.
The Fleet Foxes
Jason Mraz.
Kanye West