Jennifer Hudson arrives at the 53rd annual Grammy Awards in Los Angeles
Jennifer Hudson arrives at the 53rd annual Grammy Awards in Los Angeles, California February 13, 2011. Grammy Awards 2012: Watch Jennifer Hudson Tribute to Whitney Houston [VIDEO] REUTERS

Jennifer Hudson, who rose to fame in 2004 with American Idol, recently lost weight dramatically since she became the spokeswoman for a Weight Watchers in April 2010.

The singer has taken a big leap from size 16 to a size 0.

But how did the transformation take place? The singer talks about her career and about how she managed to lose all the baby weight postpartum.

Check out the video below.

 Jennifer Hudson reveals her weight-loss secret by LocalNews-GrabNetworks

American Idol American Idol