The 27-year-old singer dated Alex Clare for a year after meeting him in her local pub. He signed to Island Records last year and his single Too Close is out next month. Now, Amy is said to be scared that he will spill the beans about her in his lyrics.
'Amy is petrified that Alex will reveal everything about their relationship in his songs,' a source told The Sun.
'The worst thing is the music is really good so she knows he is heading for the big time.'
Following their split, Alex took to MySpace and wrote, 'After turning up at 3am at The Hawley Arms [pub] I saw the ex with her ex and I saw red mist.
'I was shaking like a leaf and decided to get leathered while she sat there inebriated and on the lap of her ex.
'I'm skint, heartbroken and homeless. Bad luck comes in threes, as the old saying goes, but s***, what's a man to do?'