In the beginning there was "Sugar Babies" . . . but now Broadway's bombardment of burlesque has competition. Ex-stripper Ann Corio's "This Was Burlesque" revue opened Tuesday at the Princess Theater. The theatrical chestnut, now billed as "A Musical Satire," first played off-Broadway in 1962 and has been wandering ever since. Mistress of ceremonies/director Corio was once known as "The Girl With the Epic Epidermis . . ."

"Superman II" is not only smashing supervillains, but records, too: The film grossed $14.1 million in its first weekend, breaking nine existing box-office records. "Superman II" is crushing all the competition, but "Cannonball Run" is right behind, taking $11.8 million in its first three days; "Raiders of the Lost Ark" pulled in $8.3 million; and "Clash of the Titans" cleaned $4.5 million from the nation's pockets.

Meanwhile, super-suits over the first "Superman" are expected to come to trial in late December. Marlon Brando's attorney Norman Garey, original "Superman" director Richard Donner and writer Mario Puzo have consolidated their cases against Warner Bros. and producers Ilya and Alexander Salkind . . .

Ol' Blue Eyes could be on the airwaves afresh soon . . . Frank Sinatra has reportedly been recording tracks in New York for a new LP. Working title: "She Shot Me Down" from Sonny Bono's hit "Bang, Bang." (Sonny Bono?) . . .

Elizabeth Taylor promised Maureen Stapleton a ladies' night on the town for her birthday, and then lured her right into a surprise party at Regine's in New York last weekend. About 200 guests, including Colleen Dewhurst, Hermione Gingold, Stephen Sondheim and Sidney Poitier screamed "Surprise!" and sang "Happy Birthday" as Stapleton crossed the threshold at midnight . . .

What a weekend . . . "Friday the 13th" started it. Then the body count continued with "Friday the 13th Part II." Currently in the works: "Thursday the 12th" with Tab Hunter, and "Saturday the 14th" with Richard Benjamin and Paula Prentiss . . .