Good 4 U

"Good 4 U" (stylized in all lowercase) is a song by American singer-songwriter Olivia Rodrigo. It was released on May 14, 2021, through Geffen and Interscope Records; it was the third single from Rodrigo's debut studio album, Sour (2021). The song was written by Rodrigo and its producer Dan Nigro who co-produced it with Alexander 23. Three months after the track's release, Hayley Williams and Josh Farro were retrospectively given co-writing credits due to influence from Paramore's "Misery Business" (2007), with the pair to receive a combined royalty share of 50%.

Musically, "Good 4 U" has been described as an upbeat song blending rock, pop, punk, and alternative styles. It consists of a staccato bassline, energetic electric guitars, and explosive drumming, with lyrics addressing a former lover who moved on very quickly after a breakup. The song received acclaim from music critics, who praised the instrumentation reminiscent of the 1990s–2000s and Rodrigo's crisp songwriting. The accompanying music video features Rodrigo as a high-school cheerleader exacting revenge, visually alluding to the 2000s films Audition, The Princess Diaries, and Jennifer's Body. At the 64th Annual Grammy Awards, "Good 4 U" received a nomination for Best Music Video.

The single reached number one in 23 countries including Australia, Germany, Canada, the United Kingdom, Ireland, and the United States; it was the second chart-topping single from Sour in many of those countries, following Rodrigo's debut single "Drivers License" (2021). "Good 4 U" peaked within the top 10 in more than 20 territories. The song received platinum or multi-platinum certifications globally as well as diamond in France and Mexico and ranks among the top 100 most streamed songs of all-time on Spotify with over 2.3 billion streams as of November 2024.