Madonna Summons Britney Spears in Twitter Q&A

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Madonna and Britney Spears, together again -- well, at least on Twitter.

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Madonna Returns to Twitter for Q&A

The pop stars, whose kiss at the 2003 MTV Video Music Award stole is still one of the most jaw-dropping moments that year, exchanged pleasantries during Madonna's late-night Q&A on the website.

Tweeted Spears to the Material Mom, who was promoting her No. 1 record, MDNA: "love the new album - every single song is incredible. congrats girl!"

To which Madonna replied, "please come on stage and kiss me again. I miss you!!"

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Among the boldfaced names with whom she bantered:

Lionel Richie: The singer, whose country duets album Tuskegee landed the No. 2 spot on the Billboard 200 chart, praised Madonna's top-ranked MDNA. He wrote, "What's going on with family? Can you believe we are sitting on the top of the charts together again?" She quipped back: "congrats on a successful record. To the other ritchie in my life.... ."

Katy Perry: The "Part of Me" pop star asked, "which evolution of you in your career has been your favorite/ most fulfilling, besides the present?" Her response: "Ray of Light. That was a good moment. I wanna see you in the front row somewhere this year. okay?"

Jerry Seinfeld's wife, Jessica Seinfeld: The New York-based society lady asked Madonna, "if you could name your next horse, what would you call it?" Her response: oh girl. I [sic] cant name my horse til I see it! You know that. I miss you."

Perez Hilton: The reformed gossip blogger wrote, "Almost the whole Twitterverse is about to ugly cry if this is your last "day" here! Stay and check in every so often!!!" Her response: "I want to live in Twitterverse with you. Let's be Girls Gone Wild together."

The singer also propositioned supporters of President Obama, using the hashtage #Obama2012 to tweet: "are you coming to my show in Washington D.C.? Make a girl from Detroit happy."

Meanwhile, MDNA is poised to sell more 359,000 copies its first week, according to Nielsen SoundScan, and debut atop the Billboard 200.

The pop queen's concert tour kicks off May 29 in Israel, and her longtime manager, Guy Oseary, told The Hollywood Reporter that she has other Middle Eastern countries in her sights.

"We would love to go play Iran," Oseary said. "We would love to play Lebanon, Egypt and Syria at some point. … Obviously, it’s just not possible."