Bruno Mars Secretly Helped BLACKPINK's Rosé Shape Her Hit Song 'Number One Girl'

• Bruno Mars played a key role in shaping BLACKPINK's Rosé's second single, 'Number One Girl', from her debut album 'Rosie'.
• Rosé revealed that Mars helped her overcome a creative block on a portion of the track during a phone call.
• Mars, who co-wrote and co-produced the song, invited Rosé to his studio to finalize his ideas for the track.
• The collaboration involved a 'little debate' between the two artists on what elements to keep or remove, ultimately leading to a better song.
• The artists also confirmed they have another unreleased song in their vault, with details yet to be revealed.