Watch the Checkin' Uptown online guitar lesson by Jeff McErlain from Blues Guitar Fakebook: Rhythm Vol. 2
From Wikipedia - "Checkin' Up on My Baby" (or sometimes "Checking on My Baby") is a song recorded by Sonny Boy Williamson II in 1960 that has become a classic of the blues. The song was not released as a single, but was included on Williamson's The Real Folk Blues album released after his death in 1965. The song has been recorded by numerous blues and other artists, making it one of Williamson's most recorded songs.