Song of the Day: No More Tears (Enough is Enough), words and music by Paul Jabara and Bruce Roberts, went to #1 in 1979 on the vocal strength of Two Divas kickin' butt (and a lousy man "out that door"): Barbra Streisand and Donna Summer. How appropriate that this duet, which ends our Donna Summer Tribute, contains the longest sustained note by a female artist (Streisand, 14 seconds) of any #1 hit on the Hot 100, when the song that started the tribute ("Dim All the Lights") contains the longest sustained note by a female artist (Summer, 16 seconds) of any Top 40 hit. It's hard to measure the influence of an artist on those who have followed. To be dubbed the "Queen" (not that one, great though he was) of a genre that some have viewed with disdain is a limitation, of course, because the work of Donna Summer transcended that era. Or maybe Disco itself has lived on. People stopped using the Dreaded D-Word to describe any popular dance recordings, but the genre's influence can still be heard (in house, techno. electronica and more). And Donna was The Queen; it's clear to this fan that later dance hit-makers, from Madonna to Beyonce to Lady Gaga, owe much to Her Reign. Today, after more than a week of looking back, we have "No More Tears" moving forward. And lots of dancing left to do; check out the single version, the extended version (from Streisand's "Wet" album), and the 12" extended mix (from Summer's album, "On the Radio: Greatest Hits, Volumes I & II").