29 year old Katy has reportedly broken up with John Mayer just 3 weeks after Valentine’s Day. According to a source that shared the news to E! News, the latest breakup was due to John’s inability to keep up with his promises to Katy. Their conflicting schedules have also made it difficult for them to continue their relationship. Notably, the ex-lovers and fellow music artists have released a romantic duet ‘Who You Love’ in December 2013.