What is the song on 90210 ad on cw website?

I don't have real-time access to external websites, including the CW website, and therefore cannot provide the specific song featured in the 90210 ad. However, you can usually find information about songs used in TV shows and ads on platforms like Tunefind or by checking the credits of the show. If you have a specific scene or episode in mind, I might be able to help you identify the song based on that context.