In June, the band went back into the studio, doing "tracking, overdubs and reworking what we'd already done, and all the time new songs would be popping up – I think we had 28 of them at one point." Albarn desired to have multiple producers involved in the album, wanting to get a "name producer" involved. Albarn had previously been in talks with Norman Cook, commonly known as Fatboy Slim, to be involved on the record, although he originally wanted to contribute "just feedback and nothing else". Albarn eventually invited him to try and work with the band. Hillier and the band also spent time working with other producers, including The Dust Brothers, whilst The Neptunes were also reported to be involved at one point.