The 'Rehab' hitmaker tragically died in 2011 aged just 27, and the 17-year-old singer claimed she still has moments when she's sure her mentor is watching over her.
She told the Daily Star newspaper: ''I still feel connected to Amy. When you lose somebody, no matter what, they're always going to be with you.
''You might not physically be able to see them, but they will be there. I'm very superstitious, so when things happen, I think, 'Hang on, that was meant to happen for a reason' or 'Oh my God, is that Amy?'
''Or even dreams. I've had dreams so close to reality you kind of think, 'Was she there for that second?' ''
Today (14.09.13) would have been the star's 30th birthday, and Dionne recalled how Amy was like ''an older sister'' to her.
She added: ''She loved doing my nails and she loved long fake round nails.
''I used to call them hoochie mama nails. We'd watch TV a lot, it was like having an older sister.''
The BBC drama starring Aidan Turner returns to BBC One on September 4th.