The 16 Senbatsu members are...
Anai Chihiro, Ota Aika, Kodama Haruka, Sashihara Rino, Matsuoka Natsumi, Miyawaki Sakura, Murashige Anna, Motomura Aoi, Moriyasu Madoka
Tashima Meru, Tomonaga Mio, Fuchigami Mai, Akiyoshi Yuka, Okada Kanna, Okamoto Naoko, Tani Marika
There will be two members to take the center position for the single which are Tashima Meru and Tomonaga Mio. According to Sashihara, the song will have many call & response parts.
HKT48's 2nd single "Melon Juice" is set for release on September 4th.
Source & Image(s): Oricon