Instruct: Classify the given review into positive or negative sentiment.
Query: Catchy tunes yes, but musically bland overall

This would prove to be Madonna's breakthrough album. Furhtermore, there's no denying that this album produced successful singles such as the title track and "Material Girl". Unfortunately this album would also be indicative of the direction that Madonna would take with all of her subsequent releases to date. Catchy tunes with good hooks, yes, but in spite of this all of her music continues to be simplistic, sugar-coated repetitive pop. Nevermind the fact that her marginal talent as a singer requires extensive doctoring by the studio engineer.