March 1977 -- is that Elton John?

I've been listening to top radio consistently since the early 80's, and I'm not surprised to hear obscure early 70's songs for the first time.  But songs from 1977?  By Elton John?  For whom I own multiple compilation albums?  Or Elvis?  Or the Bee Gees?  But that's just what happened on Casey's countdown on 70's on 7 from this week in 1977...

7 songs I have no recollection of ever having heard before, including a song near the height of the Bee Gees' popularity, plus songs by other superstars:

14 16 BOOGIE CHILD –•– The Bee Gees (RSO)-8 (14)
26 30 CRACKERBOX PALACE –•– George Harrison (Dark Horse)-6 (26)
28 32 BITE YOUR LIP (Get Up and Dance) –•– Elton John (MCA / Rocket)-4 (28)
31 33 MOODY BLUE / SHE THINKS I STILL CARE –•– Elvis Presley (RCA)-11 (31)

And in the "What Casey Doesn't Know" category, is that Elvis (whom he introduced with the unusually descriptive Biggest Star in the World) would be dead within a year.