What song is considered Etta James' signature song?

In 1961, Etta James (January 1938 – January 2012) released what was to become her signature song, "At Last!". This is a song that reached No. 2 on the R&B chart and No. 47 on the Billboard Hot 100 chart.

"At Last!" is the debut studio album by American blues and soul artist Etta James. Released on Argo Records in November 1960, the album was produced by Phil and Leonard Chess. The lyrics for the song were written by Mack Gordon.

Additionally, since "At Last!" was very popular, it rose to No. 12 on the Billboard Top Catalog Albums chart. Besides Etta James, Christina Aguilera, Celine Dion, Jason Mraz and others have offered their versions of "At Last!". In January 2009, the musical artist Beyonce famously performed this song at President Obama's Inaugural Ball.