I am having some trouble with LOOKUP()

Sample Data:
A B
Jim AA
Joe AA
Jack AA
3 AA Count
Billy GG
Bobby GG
2 GG Count
5 Grand Count



=LOOKUP("GG Count", $B$1:$B$20, $A$1:$A$20)

Retrun 5, not 2 as expected

=LOOKUP("AA Count", $B$1:$B$20, $A$1:$A$20)

Returns 3, as expected

What am I doing wrong?