There is no information available about this release, so I don't know who Aline is, but I'll wager a guess that she's from Belgium. The label, Diamonds Records, is unknown, but the photograph on the sleeve was credited to one Clement in Maasmechelen and Diamonds Records could be reached via a Belgian phone number.
So what is 'Laat de zon in je hart'? It's a Flemish cover version of Wind's successful 1987 Eurovision Song Contest entry 'Lass die Sonne in dein Herz'. A collector's item of sorts.
My collection: 7" single no. 5178
Found: Chelsea Records, Antwerpen, June 9, 2011
Cost: 3 euro
Tracks: 'Laat de zon in je hart' / 'Memories of the wind (instrumental)'