Rolling Stones 7" records* were issued worldwide [including 855 UK and 732   US pressings].

* 1823 releases + 3381 variations, as of 22 May 2025.
You can't judge a 7" by looking at its cover!

Stones7.com is dedicated to the band's 7" singles and EPs worldwide from 1963 to nowadays. Daily updated, it's the most serious and complete reference in its field since 2000 [also the best price guide].
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'I Don't Know Why' was released as a 7" single in the UK on May 23, 1975.
Its US counterpart, released at the same time, reached #42.
'I Don't Know Why' - sometimes listed as 'I Don't Know Why I Love You' - is a 1968 song by Stevie Wonder, from the album 'For Once in My Life' and was the B-Side of the 1969 hit 'My Cherie Amour'. The song was recorded when Stevie was only 18 years old.

The Rolling Stones' version was recorded on June 30, 1969. The band was mixing the song when they learned that Brian Jones had died [July 3, 1969].
The single was released worldwide in 1975 with 'Try A Little Harder' on B-side, a 1964 number from the vaults where Mick Jagger would actually be the only band member to perform. Both tracks were extracted from the 'Metamorphosis' compilation album out that same year [1975].

The single only entered the charts in the US.
First pressings miscredited the song to 'Mick... [+]