Catchy (adjective)

1. Easy to remember, especially because of having a rhythm or repetition.
2. Attractive and memorable, especially in a musical sense.
3. Easy to remember, having a catchy tune and a simple melody.

Origin:

Early 19th century: from catch + -y.

Examples:

1. The song had a catchy chorus that everyone could sing along to.
2. The jingle was very catchy and stuck in your head all day.
3. The melody was catchy and the lyrics were easy to remember.
4. The tune was catchy and kept running through my head all day.
5. The song was catchy and immediately got stuck in your head.