That seems to be the theme of this
And while the song is about dressing modest (as opposed to dressing modestly which is about the process of dressing and not the outcome of the dressing), the title uses the word virtue as opposed to modest (or modesty). Long story short: sluts are bad.
PS: No fat chicks.
And for some reason this reminds me that National Coming Out Day is some time this week.
Song: "Virtue Makes You Beautiful"
Artist: Lone Peak State Young Men Featuring Alex Boye