I was listening to Adele - Someone Like You (Speed Up), and then I searched for Adele - Someone Like You (Speed Up) 1 Hour. I clicked on a Austin Mahone cover, and then, guess what? An Austin Mahone ad popped up!
Same thing happens to me. It's because of something called data brokers. They basically watch you and record information and send it so companies know what ads to put up. It's kinda creepy.