The "high school" yearbook?
When Jenna brings Matt to her apartment, she pulls out her high school yearbook.
1) Would the 30 year old Jenna actually keep that handy? The "mean" Jenna that was referred to didn't seem like the type to sit flipping through her yearbook, or the type who would have it lying around.
2) She mentions being prom queen, but the picture looks like 13 year old Jenna.