I feel very unjustified that BoA's Girls on Top album, released around 2004 if I'm not mistaken, is her lowest selling album. It's a great song, and although it may not be as 'pop-ish' as her older releases, it's a great show of her musical growth. I really like 'Girls On Top'. Love Letter is a slow ballad, and I've always been more fond of BoA's dance songs, but it's not bad, either. :)