Finally I found a way to show you TaecYoon shippers the pictures that Yoona is wearing the 'Y' necklace in some of her airport photos this year! I should've thought of this but here are the links:

http://cfile29.uf.tistory.com/original/17638A444FEFB77A17FD35

http://jiyeontaehee.files.wordpress.com/2012/09/tumblr_mabt59g7mm1qgenkyo1_1280.jpg?w=658 (In this link/picture please look closely because the 'Y' necklace is not clearly seen. Sorry)

http://news4yoona.files.wordpress.com/2012/07/120712-gimpo-airport_2.jpg

http://images5.fanpop.com/image/photos/31300000/Yoona-Incheon-Airport-from-Macau-im-yoona-31340201-1200-856.jpg

*The links below shows that Yoona is holding the necklace! :D

http://25.media.tumblr.com/tumblr_m812z9P8gZ1rt8eu4o1_500.jpg

http://www.allkpop.com/wp-content/uploads/2012/07/20120730_yoona_airportfashion3.jpg

Well...that's all I found.

Hope to see more! :D

Note: Pics. not mine. Credit to owners! ^.^

Another note: These pics. were taken this year, 2012! ^.^