Rachel Tucker(?) and Gina Beck in Wicked, West End

Gina Beck as Glinda, Wicked, US Tour

Gina is the best Glinda I've ever seen. Her interpretation of this role is very similar to original Glinda in Gregory Maguire's book. 

Alison Luff and Gina Beck in Wicked, US Tour

Donna Vivino and Alli Mauzey in Wicked

Alli Mauzey as Glinda in Wicked, Broadway