Helen Kane, whose gay little girl's voice made the phrase "boop-boop-a-doop" a part of the legend of the Roaring 20s, died Monday at 62 after a 10 year battle with cancer. She succumbed at her home in Jackson Heights, Queens, only hours after watching a televison revival of "Three Little Words" a movie in which she sang "I Want to be loved by you" her biggest hit. Dan Healy, her husband said, "She got a great kick out of hearing her voice coming out loud and clear." The "boop-boop-a-doop" refrain that Miss Kane made a part of most of her songs had its birth in 1928 when she was appearing at New York's Paramount Theater. She inserted the line at the rehearsal and it was a hit as soon as the public heard it. "I dont know why i did it." she once told an interviewer. "It just came out like that." The line and Miss Kane's squeaky-voiced galety carried her to Hollywood. There her films brought her salaries of up to $8,000 a week. During the good days "Money was falling off trees". she recalled Miss Kane bought houses, swimming pools and businesses. But investements went bad and the fortune disappeared. She was attempting a comeback 10 years ago when cancer struck.