The Voice beat out fellow nominees America's Got Talent, Dancing with the Stars, MasterChef, and The X Factor for the Favorite Competition TV Show award.
The Voice's executive producer Mark Burnett, who also produced the People's Choice Awards broadcast, accepted the award from inside the control room.
Also during the ceremony, Jennifer -- a 32-year-old former American Idol finalist -- received the Favorite Humanitarian award in recognition of the Julian D. King Gift Foundation charity she had started following the murders of her mother, brother and young nephew in October 2008.
Jennifer accepted the award alongside her older sister Julia Hudson, whose estranged husband William Balfour had been charged with committing the murders. Jennifer got very emotional during her acceptance speech.
"I have to start off by saying the same thing I said when I won my Oscar -- look what God can do!" Jennifer said to the standing audience in tears.
"It's a team effort... It all started, like I said, back home in our church where we grew up. My mother always taught us that without family you have nothing, and whether you know it or not, we all are family. And what happens to the other happens to us, so it's very important to make a difference... We want to instill in our children that if I can do it, you can do it too!"
Jennifer also said that being a celebrity means nothing unless he or she tries to make a difference in someone's life.
In addition, although it wasn't shown during the two-hour broadcast, Demi Lovato and One Direction also won awards.
Demi, a judge on The X Factor, won two awards. She walked away with the Favorite Female Artist award and defeated nominees Britney Spears, Katy Perry, P!nk, and Selena Gomez for the honor. Demi also won the Favorite Music Fan Following award. The singer's fan base known as the Lovatics beat out the following nominees: Britney Army, Directioners, KatyCats, and Little Monsters.
One Direction, an all-male pop group discovered on the British version of The X Factor's seventh season in 2010, won the Favorite Band award. The other nominees in the category were Imagine Dragons, Maroon 5, OneRepublic, and Paramore.