There's seven songs total, but the seventh is a mixture of the other six. The official Weibo also gave a link to <a href="http://pan.baidu.com/share/link?shareid ... ">download all the songs for free</a>, however you have to download an application and sign in (I used my Weibo). I'm going to try to figure out how to upload everything to the audio/video files forum, but if you want them sooner send me a PM and I'll give you the step by step for all the Chinese.
Well they're Taiwanese and they're on a cooking show but I can't find any ratings for it, though it's been airing for at least a year so I imagine it gets pretty decent ratings. They perform on other TV shows and magazines as well as promote various things now and again (such as the Xbox 360 Kinect, drinks, and children's shoes). They also appear separately quite frequently in dramas. I'll give you some numbers Weibo Followers:JunJun-24,761;Frances-47,106;Aiko-38,337;LinLin-213,998 (Pre-solo debut was closer to 20,000.) DaXiaoJie official Facebook page-6,519 likes. So I'd say for a 12 and 10 year old they're not doing too bad. I imagine they're well-ish known and will get more popular when they get a little older.