The song "What I Like About You" is by the American rock band The Romantics. It was released in December 1979 as the lead single from their 1980 self- titled debut album. The song was written by band members Wally Palmar, Mike Skill, and Jimmy Marinos, with Marinos, the band's drummer, providing the lead vocals. The track is known for its catchy guitar riff and simple melody, embodying a high-energy rock sound. Though it only reached number 49 on the Billboard Hot 100, it was a major hit in Australia, peaking at number two and becoming one of the top singles of 1980 there. The song has been covered by several artists, including Michael Morales in 1989, Poison in 2007, and 5 Seconds of Summer in 2014. It gained additional fame through its frequent airplay on MTV in the early 1980s and has become a classic rock staple over time. Lyrically, the song expresses admiration for the qualities of a loved one, focusing on intimacy, warmth, and romantic connection with repeated lines emphasizing "That's what I like about you." The melody is simple and based on just three notes, which adds to the song's memorable and energetic feel. Overall, "What I Like About You" is celebrated for its infectious riff, straightforward and heartfelt lyrics, and enduring popularity as a rock anthem of youthful romance. If you want, I can provide the full lyrics or more details about the song's background or covers. Would you like that?