DIDDY WRITES SONG ON BREAKUP

P. Diddy has written a song about his split from Kim Porter. The rapper debuted 'Through the Pain. aka Kim Porter' and its accompanying video on Black Entertainment Television's '106 and Park' show last Thursday. Diddy - real name Sean Combs - is said to have penned the song is response to Kim's recent interview discussing their break-up. A source told hip-hop website Sohh.com: "This is how he's coming back. Basically it's like, 'You're putting me through hell.' " Kim - who dated the music mogul on and off for 10 years - has bought a luxury Beverly Hills home for her and the couple's children, 10-year-old Christian, and seven-month-old twin girls D'Lila and Jessie. The model-and-actress also has a son with former lover musician Al B. Sure. Misa Hylton-Brimm - mother of Diddy's oldest son Justin - has said Justin is missing his half brother and sisters. She was overheard telling friends: "We really miss Kim and the kids since she packed up and moved to Los Angeles."