Madonna & Lionel Richie Trade High Fives on Twitter

After Madonna scored her eighth No. 1 album on the Billboard 200 yesterday with "MDNA" and Lionel Richie's "Tuskegee" bowed at No. 2, the pair exchanged tweets, congratulating each other and joking about their past.

Madonna started the Twitter love-fest, sending "Congrats on a successful record. To the other Richie in my life," to her fellow chart-topper. Richie replied, "What's going on family? Can you believe we are sitting on the top of the charts together again? There is no one I would rather be on top with. Congratulations!! I am so happy for you," to which Madonna joked, "OK, but as long as I'm on top."

Madonna Debuts at No. 1 on Billboard 200, Lionel Richie at No. 2

Between replies, both received tweets from across the entertainment industry, with Katy Perry, Britney Spears, Blake Shelton, Darius Rucker, Kelly Ripa and more offering their congratulations to one of the artists.

Madonna continued to joke with Richie, asking, "Remember when we were neighbors?"

He replied, "Do I remember?!?! ... The only problem I had is when I came out of my house the fans would ask me where you live? I was the tour guide for the street. The neighborhood was never the same after you left."

And in response to Madonna's "You still live in that shithole?" Richie answered, "Hell no!! I moved out right behind you. The street wasn't exciting anymore."

"MDNA" sold 359,000 copies according to Nielsen SoundScan, and is Madonna's fifth straight studio album to debut at No. 1. A slot behind her on the Billboard 200 is Richie's "Tuskegee," which starts with 199,000 -- his best sales week since SoundScan began trackin! g sales in 1991.

Madonna also tweeted @Billboard to tell us how she felt after scoring her first No. 1: "The same way that I feel now. Elated, grateful, like all my Christmases have come at once."

Also on Wednesday, Madonna posted footage of an "MDNA Surprise Party" on YouTube. In it, she cuts a piece of cake and smushes it into the face of longtime manager Guy Oseary. Watch: