What highlight color is best with light brown hair color?

my mom, she wants to get highlights and I have no idea what to tell her what to do, please help me.What highlight color is best with light brown hair color?
Have her go with the tri-color highlights. They always add depth and warmth. Have a look at Jessica Biel's here:





http://images.teamsugar.com/files/users/鈥?/a>





Or maybe something like:





http://images1.fanpop.com/images/photos/鈥?/a>What highlight color is best with light brown hair color?
I would either go with a dark golden blond or, for something more subtle, a caramel highlight.
Maybe copper or amber but mostly probably a blond or something along those lines.
i think either a bright blonde or dirty blonde color
blond