Jetta is the upcoming Liverpudlian singer attracting comparisons to everyone from Solange to Florence and the Machine, and we can't get enough. She's also pretty great on Instagram too, so to celebrate the release of her new single, Crescendo (out today), we asked her to make us an exclusive Instagram photo diary. Here's what Jetta's been getting up to during her summery downtime in London, before jetting off to New York...