[SisterNightroad]

Steven Tyler and Joe Perry, they're very good friends with both Mick and Stevie, especially Steven.
They're huge fans of the band, regularly play Stop Messin' Around live on tour and have often been at FM shows through the years.
Steven often hangs with Mick in his Maui restaurant, as well as with the other band members if they're present, and was in the crowd of Stevie's Crossroad special show.
Also Aerosmith's band members nominated Fleetwood Mac members for the Ice Bucket Challenge back in the day when it was still in auge but they didn't respond.