From some of the freshest acts to the world's biggest names, it is wall-to-wall pop on day four of Barclaycard presents British Summer Time Hyde Park with Scouting for Girls, The Vamps and the Backstreet Boys all on the Great Oak Stage.
Diversity got the crowd moving by opening the main stage, whilst acts in the Village Hall included Young Kato, Rixton and Neon Jungle.
Wheatus were amongst the acts on the Summer Stage as well as George Barnett, Joel Baker and Mike Dignam. The Sony Music Unlimited stage saw an extra set from Young Kato, whilst Rixton and Wheatus returned for an acoustic set each.
From 8.15pm tonight it's the turn of THE supergroup of the moment, McBusted...
he pop line-up attracted more celebrities to Hyde Park, including: Ellie Goulding, Cara Delevingne, Emma Willis, Stephen Mulhern, Cherie Blair, Games of Thrones' Maisie Williams, Charlie Webster, Downton Abbey's Allen Leech, Rachel Riley, Chris Eubank, Shayne Ward and Liz McClarnon.
Backstage was a hive of activity with The Vamps, Hollywood Ending and Diversity all posing for pictures and relaxing before going on stage.
The Backstreet Boys dedicated their set to their number one super fan, James Bourne of McBusted who joined them on stage for their last song, I Want It That Way.
COMING UP NEXT WEEK AT BARCLAYCARD PRESENTS BRITISH SUMMER TIME HYDE PARK
Monday 7 to Friday 11 July
Free Midweek Activity: From tomorrow until Friday 11 July, the doors Hyde Park will offer a raft of free events that include great local music, a range of high-quality food, Zumba classes, Barclaycard Better View and much more.
Cinema Screenings: On Wednesday (9 July), critically acclaimed documentary 'Mistaken for Strangers' will be shown for free in the park, with the all-time classic movie The Graduate being screened on Friday (11 July).
Thursday 10 July
Comedy comes to Hyde Park as Tim Minchin leads a sold-out, all-star line-up on the Great Oak Stage that includes Milton Jones and Nina Conti all hosted by special guest Jasper Carrott.
Full details of all of this and next-weekend's music - headlined by Neil Young and Crazy Horse on Saturday and Tom Jones on Sunday - can be found at www.BST-HydePark.com