While you may commend Baby Einstein for making you into the genius you are, you're the one who deserves all the credit. There's no science to fully back up the claim that listening to music makes you smarter.
Sometimes called "The Mozart Effect," some people claim that listening to classical music will improve your cognitive development. The myth was started by Dr. Albert Tomatis in the 1950s, who said that listening to Mozart's music helped people with speech and auditory disorders. During a study at the University of Irvine in the 1990s, 36 students listened to Mozart before taking an IQ test. According to the study, the students' IQ scores went up by about 8 points. However, since then the study has been criticized and the results haven't been replicated.
Scientists have found that studying music and learning an instrument can be a different story: it can improve a person's concentration, confidence and coordination. Scientists have also found that while listening to music won't make you smarter, any sort of mental stimulation before an IQ test will generate better test results. So the next time you go in for a big test feel free to listen to Mozart or Tupac or whatever gets your brain stimulated, but know that you deserve all the credit for a good score.