Complex sentence: The new single will most likely be her last working collaboration with Heaven Music, as she has decided to leaven Heaven Music when her contract is over in June 2010, and sign with Phoebus' new record label currently being set up.
Split into simpler sentences: The new single will most likely be her last working collaboration with Heaven Music, as she has decided to leaven Heaven Music when her contract is over in June 2010. Kalomoira will be signing with Phoebus' new record label currently being set up.