Tony Bennett & Lady Gaga

Singers Tony Bennett and Lady Gaga first met in 2011 after performing together at a benefit. Three years later, they collaborated on an album of jazz standards, Cheek to Cheek. It debuted at No. 1 on the Billboard 200 albums chart, giving Lady Gaga her third consecutive No. 1 album. Bennett and Lady Gaga are currently performing across the United States with more performances slated for 2015.