Taeyeon performed with TaeTiSeo at the Blue One Dream Festival at Blue One Water Park in July 2014. Click pics for full res (~1700×1200).
Credits: Ohcori (Korean), via Taeyeonism
Seohyun @ Blue One Dream Festival
SNSD LG Dream Festival 2011
Taeyeon focus @ Cheongsim Festival
Taeyeon LG Cinema 3D Festival 2011
Taeyeon @ Dream Concert 2013