"Drift Away" from 1973.
Dobie's original peaked on the Billboard Hot 100 at #5 and became a center piece for classic hits, oldies and classic rock stations ever since.
The most successful cover of "Drift Away" came in 2003 with a version by, of all people, Uncle Kracker. It reached #9 on the Billboard Hot 100 but set a record on the Adult Contemporary chart by staying at #1 for 28 nonconsecutive weeks, June to December of 2003. Dobie made a special appearance and sang along with the last verse on the Uncle Kracker version.