My favorite Blair and Serena moments!
1x04-The end when Blair and Serena steal Eleanor's clothes and have their own photo shoot.
1x09- Serena helps Blair with Bulimia.
1x17- Blair gets everyone to help Serena with her Georgina problem.
2x01- Serena gets mad at Chuck for ditching Blair for the summer.
2x17- Serena gets dirt on Miss Carr to keep Blair from being expelled.
2x22- Blair and Chuck team up to take down Serena's lying, cheating, stealing boyfriend.
3x09- Blair and Serena make-up after a fight. Serena confesses that she is trying to find her father.
4x02- Serena convinces Blair to get Chuck to come home.
4x04- Serena and Dan help Blair get dirt on Eva.