For performances, show her some of the Arena 2005, CDLs 04-05 and 05-06 (maybe also Premium?), some of the Dome Tour 01, A Museum... A lot to show
There is thread about her best performances by AHS users opinion:
http://www.ahsforum.com/forum/showthread.php?t=97259 maybe you'll want to show some of them.
If we talk about music in general, I recommend all best albums of course.
(A BEST, A BEST 2, A COMPLETE, maybe also A BALLADS)
Show her also these PVs at first:
ourselves
RAINBOW
Endless sorrow
evolution
M
STEP you
HEAVEN
my name's WOMEN
appears
Dearest
Free & Easy
fairyland
alterna
Because of You
JEWEL
momentum
1 LOVE
Distance Love (glitter & fated)
GREEN
Days
Sparkle
Moments
Maaaany is worthy to show
