"Feelin' So Good" is a song recorded by American entertainer Jennifer Lopez for her debut studio album On the 6 (1999). The lyrics were written by Cory Rooney and Lopez, while the music was written by Steven Standard, George Logios and Sean "Puffy" Combs, who also produced the song. It was released on January 25, 2000, as the third single from On the 6.
"Feelin' So Good" is a midtempo hip hop song with a length of five minutes and twenty-seven seconds (5:27). The song was written by Lopez with Cory Rooney, Christopher Rios, Joe Cartagena, Sean Combs, Steven Standard and George Logios, with Combs additionally serving as the track's producer. It features rappers Big Pun and Fat Joe who often collaborated with each other. Lopez recorded her vocals for the song at Daddy's House Recording Studios and Sony Music Studios in New York City. It was later edited by Jim Janik and mixed by Prince Charles Alexander. Lyrically, the song is about Lopez being in a good mood, with nothing bringing her down. Lopez sings in the chorus: "I'm feelin' so good / I knew that I would / Been talking care of myself / Like I should / Cause not one thing / Can bring me down / Nothing in this world gonna turn me around". It contains a sample of Strafe's song "Set It Off" (1984).
Around the time of the single's release, Big Pun, who was slated to join Lopez and Fat Joe for a performance of the song on Saturday Night Live died after a heart attack related to weight issues. Lopez responded to this with a statement "He was a source of pride for the Latin community, a great artist and a great person. We will miss him terribly." The song was remixed for her J to tha L-O! The Remixes by Sean Combs, the song's original producer.
The song received positive reviews from music critics, who enjoyed Lopez going back to her roots. Richard Torress from Newsday said "Sean (Puffy) Combs shows a deft studio touch on the hip-hop jam "Feelin' so Good," with Lopez doing a good job on a track tailor-made for the talents of Mary J. Blige." Despite only reaching #51 on the Billboard Hot 100, the single was considered a strong fourth single from Lopez, charting inside the top 20 of several charts.
Lopez and her mother in the music video for "Feelin' So Good"
The music video for the song was directed by Paul Hunter and shot in the Bronx in 1999. It is the last video Pun would take part in before his death on February 7, 2000. The video starts with a white text that says "In loving memory of Christopher "Big Punisher" Rios (November 10, 1971 – February 7, 2000)", Lopez lying on the bed answering phone calls from both Big Pun and Fat Joe. She soon hangs up, has her breakfast (fed to her by Lopez's actual mother)  and begins her daily routine. She is seen finding money on the pavement, receiving a paycheck and buying clothes in a sale, which accounts for her good mood. Later, her friends (Lopez's actual friends) pick her up from her house, before they catch the 6 train to a club. There is then an instrumental break, where Lopez and some back-up dancers perform to Manu Dibango's 1972 song "Soul Makossa". The beat of "Feelin' So Good" returns, and Pun and Joe meet her in the club performing their raps. The video ends with Lopez and her friends returning to the station and catching the train, with Lopez looking out the dark window, reflecting on her day.