Some of the biggest names in music have united to record a cover of the Beach Boys track God Only Knows for the BBC's new music initiative, BBC Music.
From Rock to Opera, the line-up covers decades and genres.
If you're having trouble spotting all of the stars who feature in the video, here they are in the order they appear:
Martin James Bartlett: Winner of the 2014 BBC Young Musician of the Year competition.
Pharrell Williams: American singer/producer and one of the busiest men in music who recently had huge success with feel-good track Happy.
Emeli Sande: Scottish singer/songwriter and winner of the 2013 Brit award for both Best Female Solo Aritst and British Album of the Year.
Elton John: One of the best known British artists of all time. Sir Elton's career has spanned four decades and included dozens of hit singles.
Lorde: Teenage sensation from New Zealand, best known for hit track Royal from her debut album Pure Heroine.
Chris Martin: Frontman of band Coldplay, one of the most successful UK groups of the past 20 years.
Brian Wilson: American and member of the Beach Boys, who recorded the original version of God Only Knows.
Florence Welch: Frontwoman of British indie band Florence + the Machine.
Kylie Minogue: Australian singer who recently performed at the closing ceremony for the 2014 Glasgow Commonwealth Games.
Stevie Wonder: American Motown legend, famous for hits including Superstition, Signed Sealed Delivered, and I Just Called to Say I Love You.
Eliza Carthy: English folk musician, who recently released double album Wayward Daughter to mark her 21 years in the business.
Nicola Benedetti: Scottish classical music star best known for her violin skills. The 27-year-old from West Kilbride was made an MBE last year.
Jools Holland: English pianist, former member of Squeeze, boogie-woogie enthusiast and presenter of Later... with Jools Holland on BBC Two.
Brian May: Queen guitarist and, more recently, campaigner against badger culls in England.
Jake Bugg: English singer/songwriter, whose self-titled debut album reached the top of the charts in 2012.
Katie Derham: BBC Proms presenter, who recently rediscovered her passion for playing the violin herself.
Lauren Laverne: Despite being a former singer in teen band Kenickie, the BBC Radio 6 Music DJ does not sing in her brief appearance in the video.
Gareth Malone: English choirmaster and broadcaster best known for BBC Two's The Choir and helping the Military Wives choir towards a Christmas number one.
Alison Balsom: Award-winning English trumpeter. She is a former winner of the female artist of the year award at the Classic Brit Awards.
One Direction: One of the most successful British boy bands of all time, Louis Tomlinson, Zayn Malik, Liam Payne, Niall Horan and Harry Styles emerged from The X Factor to become superstars across the globe.
Zane Lowe: The second of the BBC DJs to feature in the video is New Zealander Lowe who presents the evening show championing new bands on BBC Radio 1.
Jaz Dhami: Birmingham-based Bhangra artist who originally trained in Indian classical music.
Paloma Faith: English singer and actress currently on a career high after notching up her first number one single with Changing, her collaboration with bass duo Sigma
Chrissie Hynde: American singer who reached number one with her own band the Pretenders on Brass in Pocket in 1980 and then with UB40 on I Got You Babe in 1985.
Jamie Cullum: English jazz and pop singer and pianist - and presenter of a popular jazz-based show on BBC Radio 2.
Baaba Maal: Senegalese singer and Oxfam ambassador who recently took part in the Africa Express project with concerts in major UK cities and pop-up shows in schools, factories and railway stations.
Danielle de Niese: Australian opera singer, based in the US. She won a talent show aged nine singing a medley of Whitney Houston songs and her prize was a Yamaha baby grand piano, which she still owns.
Dave Grohl: Foo Fighters frontman and former drummer in cult rock band Nirvana.
Sam Smith: British singer/songwriter who has already sung on three number one singles, having been tipped by the BBC as the Sound of 2014 at the start of the year.