RAYE, Niall Horan and Fatboy Slim lead first wave of stars for Capital's Summertime Ball 2026 Capital has unveiled the first names for this year's Summertime Ball with Barclaycard, returning to Wembley Stadium on June 6 with 80,000 fans and a stacked line‑up of global stars. 28 April 2026 RAYE, Niall Horan, Fatboy Slim, Myles Smith, Sekou, Robyn, Bebe Rexha and new boy band December 10 are the first artists confirmed for Capital's Summertime Ball with Barclaycard 2026.