Hello! Project Wonderful Hearts Summer 2008 ~Hisochi de date itashima show~... I think that's what it's called.
Lots of great performances there, Jun + the kids perform Tropical Koishiteru, Ai + eggs perform Koi ING, Reina + kids perform Kousui, Sayu + Risako perform Chu! Natsu Party, overall it's a very summery concert with a great tracklist.