The Voice Coach Roundup: Taylor Swift and Alicia Keys are joining The Voice. Taylor Swift will be a free-floating authority, moving from artist to artist, while the "Un-Thinkable" singer will coach on Pharrell Williams' team. The judges on The Voice this year will be Williams, Gwen Stefani, Blake Shelton, and Adam Levine.

Alicia Keys will mentor Pharrell Williams' team of contestants.

Gwen Stefani, from the band No Doubt, will be replacing Christina Aguilera and will finally get to collaborate with her rock star husband, Gavin Rossdale. Gwen Stefani recruited Gavin Rossdale, from the band Bush, to be her guest mentor for the upcoming season of "The Voice."

Christina Aguilera and Cee Lo Green are taking a hiatus from The Voice and Stefani will join new recruit, "Happy" singer Pharrell Williams.

Taylor Swift will advise and work with all talent, not just talent on one specific team. Swift is preparing for the release of her new album, "1989," which is led by the chart-topping single "Shake It Off."

Stevie Nicks, the legendary singer of the band Fleetwood Mac will be joining The Voice season 7 as an advisor on the Adam Levine team. Stevie Nicks and Adam Levine join new judges Pharrell Williams and Gwen Stefani who are former judges Cee Lo Green and Christina Aguilera.

Nicks told Extra "I just think it's a great show. And I know (Adam Levine) would never still be sitting here seven years later if this wasn't a great show."

Nicks and Levine come from different sides of rock/pop music, but during the finale of The Voice Season 1, Team Adam performed a version of "Landslide," which Nicks wrote for Fleetwood Mac.

Alicia Keys is set to release a new album in 2015. Alicia Keys hasn't had a new album in two years, "Girl On Fire." The "New York" singer is promising that her next album will be a fully cohesive piece, not just a bunch of well, great songs, evocative vocals and classy piano.The album isn't finished yet, but Kays says "Killing Your Mother" is already her favorite song.

But don't take it literally. The 14-time Grammy Award-winning singer songwriter, is pregnant and the singer decided to dress up that baby bump on Instagram on the lap of her husband Swizz Beatz, 35, in a celebration of their four year wedding anniversary.