"Death has a shadow", which happens to be the first ever episode of Family Guy made
Play It Again, Brian
Brian sings "For the Love of Money" by "The O'Jays" in "Peter, Peter, Caviar Eater"
Season 4|Episode 23 Deep Throats
Season 2|Episode 13 Road to Rhode Island
Season 6 | Peter's Daughter
Season 3|Episode 17 Brian Wallows and Peter's Swallows
In the Episode 15 of Season 4 "Brian Goes Back to College", Peter and his friends find Brian, who is writing a report for the local newspaper. When Peter and his friends win the costume contest, Brian writes a report about it, and is later telephoned by a member of The New Yorker, who tell him they would like him to work for their magazine. Brian is initially given a warm welcome by the staff, but he is immediately fired after he informs them he never graduated from college.
Peter Peter Caviar Eater
syrup o Epicac
It is called "Play it again, Brian" and is season 6 episode 10
The Son Also Draws
The episode where Brian, Stewie and Peter sing "The Freakin' F.C.C." Is PTV, Volume 4 episode 1.