On June 19, 2011, she won the Miss USA title in Las Vegas, Nevada.She is the second redhead and the first Miss Teen USA first runner up to win the Miss USA title.
In December 2011, Campanella traveled to Pensacola, Florida before traveling to Cannes and Monaco for the Five Star Diamond Awards.She traveled back to Los Angeles to attend the First Annual American Giving Awards on NBC.In March 2012, Campanella traveled to Germany with her sister titleholders for a week-long USO/Armed Forces Entertainment tour on March 9–14, 2012.In May 2012, Campanella traveled to Orlando, Florida to cohost the Runway for Hope fashion show with Mario Lopez before traveling to Las Vegas to pass on her crown.She has modeled in campaigns for Sherri Hill, Aloxxi International, and Conair.
Campanella has modeled in Mercedes Benz Fashion Week in New York City in 2010, 2011, and 2012.
Her sister titleholders were Danielle Doty of Texas and Leila Lopes of Angola.
In July 2011, Campanella attended the Miss Teen USA 2011 competition in the Bahamas.
She was named the first runner-up in the 2007 Miss Teen USA pageant while representing New Jersey and represented California in the 2011 Miss USA pageant.
As the reigning Miss USA, she represented the United States in the Miss Universe 2011 pageant held in São Paulo, Brazil, in September 2011, where she finished in the top 16. Campanella was born in New Brunswick, New Jersey on March 21, 1990.
Her maternal grandfather immigrated from Helsingør in Denmark.