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.''
Her parents weren't too fond of the idea.
The flat at Hauptstrasse 155 was where Bowie and Iggy lived between 1976 and 1978 in the city, which inspired the so-called 'Berlin trilogy' albums.
Grint will star alongside Dougray Scott and Ed Westwick in a 10-part TV series for Sony's streaming platform Crackle.
The Brits teamed up at the Hollywood Rose Bowl to perform a cover of The Purple One's 'Nothing Compares 2 U'.