Tracks like Heaven Knows, Lost in America and Closer to the Night could all be released as singles, methinks.This is a woman to watch.it itSJG***Donna Summer Mistaken identity: AtlanticIt's too bad Donna Summer wastes her magnificent voice on trashy, predictable, soda-pop music.This album has but two tracks worth listening to — When Love Cries and Heaven’s Just a Whisper Away. Otherwise, it’s boring — even a little irritating.Summer co-wrote 10 of the albums 12 songs, and despite an excellent cast of back-up musiciansand co-writers, it falls short of expectations.A number on side 2 with a promising title — Fred Astaire — is repetitious and annoying. The only thing most of this album is good for is dancing (with appologies to Fred Astaire), thanks to its omnipresent disco beat.★SJG«**Kenny Loggins Leap of Faith: ColumbiaEvery once in a while, pop stars break away from commercially motivated tunes to relate their personal experiences and feelings.Kenny Loggins, who first came on the musical scene in 1970 with Jim Messina as part of the duo Loggins and Messina, is among the