Ugh- totally agree.Sweet Child O' Mine - Sheryl Crow
When you cover a song, you don't do the hardest to surpass. You do the easiest. I wouldn't touch "Boys of Summer," "Satisfaction," "Sweet Child O'Mine"....none of an artist's best work. It would seem to me better to cover a lesser known piece of work like Rod Stewart did with Tom Waits and Robbie Robertson.
Also- Dave Matthews does an awesome version of "Time of the Season" by The Zombies.