"Whole Lotta Love" was Led Zeppelin's only US Top 10 hit, charting at #4. Many of their songs, including "Stairway To Heaven," were not released as singles, as it was considered bad form in England to make people pay for singles that were on albums.
Jay-Z's 2012 "Glory" features his daughter Blue Ivy Carter's cries and coos. At less than two days old, she became the youngest ever credited artist to feature on a Billboard chart when the song debuted on R&B/Hip-Hop Songs at #74.
Phil Oakey recorded his vocals for "Don't You Want Me" in the studio bathroom. The recording was disrupted by guitarist Jo Callis reaching through an open window from outside to repeatedly flush one of the toilets.