Barbara Walters knows how to throw an unforgettable party to celebrate her 85 years on the planet.

Walters' birthday bash at the newly refurbished Rainbow Room in Manhattan over the weekend was fit for a queen, reports Roger Friedman of Showbiz411. The star of the party, notes Friedman, was Paul McCartney, who came with wife Nancy, Barbara's second cousin. The M's were seated at Walters' table, along with venerated columnists Liz Smith and Cindy Adams, former Mayor Mike Bloomberg and gf Diana Taylor, and Henry and Nancy Kissinger.

The hostesses for the party were Princess Firya of Jordan, Annette de la Renta (wife of Oscar), Marie Josee Kravis (wife of Henry), and Nicole Seligman (wife of former NY Schools Chancellor Joel Klein), adds Friedman.

Guests included not only the Russian ambassador but the Israeli one too, as well as Frank Langella, Charlie Rose, Gayle King, David Geffen, Peggy Siegal, Mort and Linda Janklow, former ABC News chief David Westin and wife Sherry, super lawyer David Boies, Patricia Duff and Richard Cohen, and Allen and Debbie Grubman.

Walters shares her birth date - Sept. 25 - with Michael Douglas and Catherine Zeta Jones, who've celebrated with her in the past but couldn't make it this time.

The big show stopper for the night: the band played McCartney's "I Saw Her Standing There." The ex-Beatle scooped Walters up onto the dance floor, took the mic from the bandleader, and sang his famous song to her!

"Barbara was shaking she was so excited," a source told showbiz411. Then some 150 party-goers got up and started dancing The Twist!

Yep, Walters and her guests know how to party down!