The Sound of 2015 winners make their debut.

If you knew, would you sing along?

The soul-pop queen sweet-talks the Live Lounge.

It's all about Meghan Trainor in her Live Lounge debut.

Bittersweet anthems in the intimacy of the Live Lounge.

Hozier brings his impressive voice to Maida Vale.

Milky Chance are in the Live Lounge for Fearne.

Festival favourites grace Radio 1 for a dark and energetic session.

Pow! Lethal B touches down in the Live Lounge.

The Hackney actress and rapper drops into the Live Lounge.

Charli's doin' it in the Live Lounge for Radio 1.

Prepare for anthemic emotion from the Dragons boys.

George Ezra performs for Fearne Cotton in BBC's Live Lounge.

Royal Blood perform in the Live Lounge.

Emotion in the heart of the machine.

Ed gives us a special extended performance.

James gives a soulful performance of Hold Back The River.

Jungle bring the heat to the Live Lounge.

Ella performed a stripped-back cover of Hold Back The River.

Kwabs is joined by Stormzy for a surprise cover.

Sigma join forces with Labrinth to take things higher!

When Jess is with us, there's no place we'd rather be...

Liverpool's finest sons brings some T-shirt weather to the Live Lounge.

The band rock the Live Lounge with a special cover!

Jamie T brings all that bass to the Live Lounge!

The guys hit the high notes with their Sia cover!

Nick Jonas covers Years & Years

The Wombats rock the Live Lounge.

The band treat us to 6 tracks back to back.

Tove Lo performs her hit Talking Body.

Kygo performs a beautiful acoustic version of Firestone.

Prepare yourselves...

Lower than Atlantis perform a special Live Lounge from the Radio 1 Academy in Norwich.

Jessie Ware is in the Radio 1 Academy Live Lounge in Norwich for Fearne.

The Maccabees perform in the Radio 1 Academy Live Lounge from Norwich.

Ella Eyre performs in a special Academy Live Lounge in Norwich.

The Vaccines join Fearne in the Radio 1 Live Lounge to perform Dream Lover and a cover of One Direction's Night Changes. Plus we hear Annie Mac's Hottest Record from Muse.

Ben Howard is in for Fearne's final live lounge and he perfoms 'Small Things' and an amazing cover of Jessie Ware's 'Wildest Moments'!

Rixton are in the Radio 1 Live Lounge with Clara! They performed their song 'We All Want The Same Thing' and covered Skrillex & Diplo ft. Justin Bieber with 'Where Are U Now'.

Kelly Clarkson joins Clara in Radio 1's Live Lounge to perform Hearbeat Song and a cover of Rihanna's Better Have My Money.

The boys bring us a special Rock Week cover of Muse.

Tove Lo's Talking Body is given a rock twist!

Everything Everything are in the Radio 1 Live Lounge performing 'Regret' and a cover of Kelly Clarkson's 'Heartbeat Song'.

Miguel is in the Radio 1 Live Lounge performing 'Coffee' and a cover of Slaves 'Hey'.

Wolf Alice are in Radio 1's Live Lounge for Clara.

Lost Frequencies is in the Radio 1 Live Lounge for Clara.

Radio 1 couldn't fit all of his brass band into the Live Lounge, so Clara's down at Maida Vale with Mark Ronson!

Rhodes is in the Radio 1 Live Lounge for Clara.

Years & Years are in Radio 1's Live Lounge for Clara.

Birdy is in the Radio 1 Live Lounge for Clara performing her single "Wings" and a cover of Kygo's "Firestone."

Little Mix are in the Live Lounge and perform their new single "Black Magic" and a mash up of Jason Derulo's "Want To Want Me" and Whitney Houston's "I Wanna Dance With Somebody."

Lianne La Havas is in the Live Lounge for Clara performing her single "What You Don't Do".

Clara has Kygo featuring Ella Henderson in the Radio 1 Live Lounge.

R City are in the Radio 1 Live Lounge with Clara.

MNEK performs in Radio 1's Live Lounge for Clara.

Jason Derulo joins Clara in the Radio 1 Live Lounge.

Foals are in the Radio 1 Live Lounge with Clara.

The Maccabees are in the Radio 1 Live Lounge with Clara.

Jamie Lawson is in the Radio 1 Live Lounge for Clara.

Adele Roberts sits in for Clara Amfo with Lower Than Atlantis in the Radio 1 Live Lounge.

Adele Roberts sits in for Clara Amfo with Mercury Prize nominees Wolf Alice in the Live Lounge.

Fleur East joins Clara in the Radio 1 Live Lounge to perform her new single 'Sax' and a cover of Nick Jonas - Levels.

The Vamps are in the Live Lounge with Clara

Olly Murs is in the Live Lounge with Clara

Hozier is in the Radio 1 Live Lounge, covering a Christmas classic for Clara!

Slaves are in the Radio 1 Live Lounge and covering a Christmas classic.

Sound of 2015 winners Years & Years perform in the Radio 1 Live Lounge for Clara.