Dates: Late 2013 or early 2014
Players: Flea, Josh Klinghoffer, Chad Smith, possibly Anthony Kiedis.
Recorded at: Unknown
Produced by: Unknown
Engineered by: Unknown
Mixed by: Unknown
Broadcast on: February 2, 2014
The band performed a condensed version of Give it Away as part of Bruno Mars' halftime show at the Superbowl. As countless news articles may have made you aware, the band were lip syncing to a track (not the album version) recorded prior to the performance.
Where, when and with who they recorded that track is unknown. If they recorded anything else is also unknown. If Anthony was actually involved in the recording, doing a guide vocal, for example (his vocals were live on the night) is, you guessed it, unknown.