The phrase "You Should Hear How She Talks About You" is widely known as the title of a popular song by Melissa Manchester, released in 1982. The song was a major hit for Manchester, reaching number five on the U.S. Billboard Hot 100 chart and winning her a Grammy Award for Best Female Pop Vocal Performance. It was written by Dean Pitchford and Tom Snow and marked a style departure for Manchester with a new wave dance quality compared to her usual ballads. Melissa Manchester is an accomplished American singer-songwriter and actress who began her career in the early 1970s. She gained recognition with hits like "Midnight Blue," "Don't Cry Out Loud," and of course, "You Should Hear How She Talks About You." Her music blends pop, rock, and soul, and she has had a long, versatile career in music and acting, including songwriting for film and appearances on TV.

So, the phrase you mentioned is famously associated with Melissa Manchester as a song title expressing admiration or talk about someone, often interpreted as positive and affectionate talk conveyed through the memorable title of her Grammy-winning song.