"Get the Party Started" is a song by American singer Pink, released on October 16, 2001, as the lead single from her second album, Missundaztood (2001). The song was originally intended for Madonna's 2000 album Music, but when her team turned it down, it was later given to Pink.

"Get the Party Started" received positive reviews and became an international success, reaching the top 10 in many countries and topping the charts of Australia, Canada, Ireland, New Zealand, Romania, Spain, and Wallonia. In 2003, Q ranked the track at number 185 on their list of the "1001 Best Songs Ever". About.com rated the song number one in their list of "The Top 100 Best Party Songs of All Time" in 2019.

"Get the Party Started" was composed by former 4 Non Blondes frontwoman Linda Perry. She said that the process of making the song was "so unlike me"; according to her, she was going through a "weird phase" during which she wanted to learn how to program drums. She programmed her first beat, started playing a bass guitar, and, in her words, "did what the beat was asking me to do." She decided to put "every wrong instrument" in the song, and consequently added in a horn sample. "I was doing the music, the melody was already coming to me in what I wanted the song to be," she said. She then decided to write lyrics containing "every catch phrase you possibly could imagine", before laughing at the realization that she had written a potential hit single and her first dance song. "You create something in your bedroom or your house, and it's just a fun thing that you're doing," she said. "Then all of a sudden, you hear that song that you started in your house, and it's on the radio. And people are now acknowledging it. It's just trippy." Some listeners thought the song made a reference to ecstasy, the drug of choice for ravers: "I can go for miles if you know what I mean. I'm comin' up so you better get this party started."

Pink told Q Magazine in a 2017 interview: "You'd have to ask Linda Perry if it's about ecstasy. I don't know what she meant with it. I still don't know if it's 'I'm coming out...' Or 'I'm coming up...' I don't even know what I sang."

AllMusic highlighted the song and added: "This record bubbles over with imagination, as hooky pop songs like the title track rub shoulders with glitzy dancefloor anthems like "Get the Party Started." Jim Farber was favorable: "The single "Get the Party Started" has the tricky synth hook of a perfect new-wave hit from the '80s." NME was less positive, saying it "displays the kind of clod-hopping attention-seeking on single 'Get the Party Started' that makes you assume you're listening to a Geri Halliwell record." Jason Thompson described this song and praised: "the dance inducing "Get the Party Started". Again, even this isn't really in the mold of current dance tracks. Instead, it feels more like the kinds of grooves that were coming out in the early Nineties, when alt-rock was influencing the discos as well as the college charts. In fact, it sounds a little like Apollo Smile who had an album out back in '91 or so. "Get the Party Started" also echoes the good time vibe that other hits like Deee-Lite's "Groove Is in the Heart" had that won over many fans. This track should do just the same thing. It did for me, anyway."

Slant Magazine called this song "retro-dipped dance-pop." Sputnikmusic marked it as a highlight and added: "It is not all slow and serious going though, as 1st single 'Get The Party Started' proves. As the song title suggests, this is the dance-oriented party-starter that the artist's debut album lacked." Stylus magazine called the song "near perfection." Max Mohenu of Espresso said that the song felt "fun and imaginative, and challenged what it meant to be a successful pop artist who didn't have the Britney Spears look."

"Get the Party Started" reached number four on the US Billboard Hot 100 on December 29, 2001, becoming one of Pink's biggest solo hits in the US with "Most Girls" also reaching number four on the Billboard Hot 100 in 2000 and "So What", "Raise Your Glass", and "Just Give Me a Reason" (featuring Nate Ruess) reaching number one in 2008, 2010, and 2013 respectively, and "Fuckin' Perfect" that reached number two in America. The single's success was spurred by heavy airplay in the US, which prompted the song to also peak at number four on Billboard's Radio Songs chart. The song peaked at number two in the UK, where it was certified platinum for sales and streams exceeding 600,000 units. The song reached number one in Australia and number two in many European countries, including Austria, Germany, Italy, and Switzerland.

"Get the Party Started" is certified multi-platinum in Australia, platinum in Canada, Norway, and the UK, and gold in Austria, Germany, France, Sweden, and Switzerland. The song was nominated for a Grammy Award in 2003 in the category of Best Female Pop Vocal Performance, which it lost to Norah Jones's "Don't Know Why" at the 45th Annual Grammy Awards. It won the award for Favorite Song at the 2002 Kids' Choice Awards, and won Best Song at the 2002 MTV Europe Music Awards. "Get the Party Started" is often considered one of Pink's signature songs as she tends to finish her shows with this song in her encore section along with a ballad song such as "Nobody Knows" and "Glitter in the Air". In July 2011, the song was listed as number 81 on Rolling Stone's Top Songs of the 2000s.