Leonardo DiCaprio Surprises 'Ellen' Audience to Talk Climate Change Doc; Justin Timberlake Explains 'Trolls' Lyrics

Michael Rozman / Warner Bros.

DiCaprio promotes 'Before the Flood' and 'Trolls' star Justin Timberlake tells Ellen DeGeneres she's been singing his song incorrectly.

Justin Timberlake and Leonardo DiCaprio both made appearances on The Ellen DeGeneres Show Friday.

Timberlake played a game of "5 second rule" and schooled host Ellen DeGeneres on the lyrics of his Trolls Song, "Can't Stop the Feeling."

During the game, Mario Lopez asked the pair questions to answer with three descriptions. When Lopez asked Timberlake how he brings sexy back, the singer immediately replied, "In the front, up top and on my head."

When sitting down with DeGeneres, Timberlake bragged about how smart his 18-month-old son is and talked about his upcoming film with Anna Kendrick, Trolls.

He thanked DeGeneres for sending him a video of herself singing his "Can't Stop the Feeling" single, after she "didn't" imbibe the tequila he sent her. His favorite part? When DeGeneres sang the wrong lyrics and said "Just electric" instead of "Just imagine."

"It pretty clearly says 'Just imagine,'" said Timberlake, as DeGeneres argued her case and asked the audience to back her up that his "imagine" sounds like "electric."

Before the end of the show, Leonardo DiCaprio made a surprise appearance to the absolute delight of the crowd. DeGeneres said that a few hours before filming she asked the actor to stop by while she talked about his new documentary, Before the Flood.

DiCaprio discussed his three-year project on climate change and urged people to vote in the election, saying the United States needs leaders who "believe in modern science."