Alex Getlin, 18, Performs at Feinstein's at Loews Regency It always gives me pause when great expectations are heaped on a teenage performer, no matter how talented. The temptation for the singer is to swallow the hype and breathlessly await the imminent glory predicted by pundits. But it should be remembered that over the last 50 years scores of baby Barbra Streisands have been promised show business conquests that haven't materialized. And as 18-year-old Alex Getlin, a confident, engaging young Broadway-style singer with a big voice performed her show, "You're Gonna Hear From Me," on Monday evening at Feinstein's at Loews Regency, I worried. Ms. Getlin's show was all about ambition and drive. Not only its title song, from the movie "Inside Daisy Clover," but also "A Lot of Livin" to Do," from "Bye Bye Birdie," and "If My Friends Could See Me Now," from "Sweet Charity," express big dreams. Ms. Getlin prefaced the song from "Sweet Charity" with a mention of a group of seventh-grade girls who once tormented her. Accompanied by members of Michael Feinstein's band, including his music director, John Oddo, on piano, Ms. Getlin showed that she is indeed talented. She has a forceful, very nasal voice with a hard metallic timbre and a rapid vibrato. Mr. Feinstein, an enthusiastic booster who has pronounced that Ms. Getlin has "it," joined her for a duet on "How About You?" The most captivating numbers tended to be more offbeat selections like Joe Iconis's "Joey Is a Punk Rocker," a cheerleader's fantasy ode to a boy who paints his nails black and wears dog tags. Folding together two Sondheim songs, "Children Will Listen" and "Not While I'm Around," she made a cogent statement about parental influence and protection during adolescence. Frank Loesser's obscure "Can't Stop Talking About Him," a swinging rapid-fire patter song from the 1950 Betty Hutton movie "Let's Dance," was delivered at breakneck speed. What did this high-energy show augur about Ms. Getlin's future? It's much too early to say.