POPSUGAR Celebrity Jessica Simpson Slide Picture of Jessica Simpson Singing at Rockefeller Tree Lighting in NYC Light Up My Life by Lauren Turner 12/01/10 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Jessica Simpson performed at the Rockefeller Tree Lighting Ceremony in NYC on Tuesday. Image Source: WireImage Read More Jessica Simpson Jessica Simpson Jessica Simpson's Daily Workout Is Surprisingly Simple Jessica Simpson Shares the Sweetest Family Snaps Jessica Simpson's Activewear Line Just Launched and We're Adding Everything to Our Wish List Guess Which Celebs Have Lived in Jennifer Lawrence's Home? POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Be in the Know With OurCelebrity and Entertainment Newsletter Personalize Movies Young Hollywood TV A-Listers Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.