Bruno Mars has managed to become the most listened to artist on Spotify, despite not releasing an album for over eight years. For some time now, The Weeknd has pretty much secured the top spot of No.1 Spotify artist for monthly listeners. Now, Bruno Mars has claimed that title and broken a record, all thanks to two hit duets. Mars has a substantial catalogue of evergreen tracks – songs that get played over and over again all year round. This certainly has contributed to the streaming statistics success for the artist, but two relatively new duets have helped boost up…