Momoiro Clover Z 's first single after Hayami 's departure was " Z Densetsu : Owarinaki Kakumei " , accompanied by a new group image and stage performance . The girls wore outfits with helmets and so-called " transformation belts " reminiscent of Japanese superhero movies , and the music video also borrowed from such " Super Sentai " imagery . In July , Momoiro Clover Z released their first album , '' Battle and Romance '' . Later in December , '' Hotexpress '' described the band as the number-one breakthrough idol artist of 2011 and stated that the album became a big turning point for them . Next February , '' Battle and Romance '' won the Grand Prix at the CD Shop Awards as the best CD of the year selected by music shop employees from all over the country . Momoiro Clover Z was the first idol group to win the award . On Christmas Day , 2011 , Momoiro Clover Z gave a concert at Saitama Super Arena to their biggest audience to date : all 10,000 tickets were sold out
CD Shop Awards
CD Shop Awards
Momoiro Clover Z