Gwen Stefani talks about her Christmas album, You Make It Feel Like Christmas, and how Blake Shelton's adjusting to life as People's Sexiest Man Alive.

Nick Grimshaw takes pop superstar Harry Styles to connect with some people who don't care much about his fame or musical talent.

The relationship has its ups and downs, and here we see the couple fighting in the kitchen after his old friends visit. As she turns twenty-one and he doesn’t show up on her birthday, the writing is on the wall for this doomed relationship.

James Corden and Jennifer Lopez carpool to CBS singing some of her most popular tracks before James takes Jennifer's phone and sends a text to Leonardo DiCaprio.

James Corden and Jennifer Lopez talk about marriage, romance, and the beauty of the Spanish language.

The roads are busy today as Jennifer Lopez rides along with James and they blast out some of her greatest tunes together. James wants to know if there’s any truth in the rumour that Jennifer once insured her butt for a million dollars, and he can’t resist having a bit of fun with some other drivers stuck in the traffic.

Cheryl teaches the iconic choreography from the music video for her song "Promise This," in particular focusing on the moves from the song's chorus.

The flamboyant pop sensation Lady Gaga talks about the creative process behind her single "Applause." She explains how being forced to slow down by a hip injury actually helped her to focus, about working with famous names from the world of art, and exactly how much it means to her to be performing again for her adoring fans.

Stevie Salas and Christina Fon talk about striking the right balance between entertainment and a political message, and what they hope their film will achieve.

The filmmakers talk about some of the people they wanted to interview for the documentary. Sometimes it just took time, and in a few cases it didn't work out at all. For Christina, one highlight was getting to interview writer and activist John Trudell before his death in 2015.