The song "So What" is by American singer Pink, released as the lead single from her fifth studio album, Funhouse, in 2008. It was written by Pink, Max Martin, and Shellback. The song is about Pink's separation from her husband, freestyle motocross rider Carey Hart, and features a confident, energetic vibe with a martial beat and synth backing. "So What" achieved major commercial success, topping charts in several countries including the US, UK, Germany, Austria, and Switzerland. It reached number one on the US Billboard Hot 100 and became Pink's highest-selling single in the US with over 4 million downloads sold. The song was praised for its aggressive and empowering nature and won the MTV Europe Music Award for Most Addictive Track. The music video shows Pink engaging in rebellious activities like riding a lawnmower drunk, sawing a tree with a chainsaw, and smashing a guitar in a music store. Carey Hart, her husband at the time, makes a cameo appearance. Overall, "So What" is a glam rock, pop rock and electronic rock song that captures Pink's bold, defiant attitude during a turbulent time in her personal life. It remains one of her most iconic and successful songs from the late 2000s. If you want, I can provide more details such as lyrics, chart performance, or the music video. Would you like that?