^ No, she commemorates her anniversaries while on the countdown for them. She began the 15th anniv special stuff with the first class second limited live on December 2014 and finished them with The Artist on December 2015, and that was pretty much the same with her 10th anniversary
And yeah, WOML was her 15th anniv album, it was promoted that way and the tour also had the 15th anniv theme along with supporting the album.