Both songs were officially released and listed in their albums, it's also listed in every music charts.
1. SNSD's Beautiful Girls (ft. Yoo Youngjin)
The reason is:
Taeyeon.. Jessica.. Tiffany.. Sunny-Yuri.. Hyoyeon.. Seohyunie.. Sooyoung and Yoona~
Lalalala~
2. Rainbow's To Me (Club Ver.)
The reason is:
Listen to the first 2 minutes and you'll know why.
-??? I thought my phone was lagging!!
-I think it's because that's the 'Club Version' of it..ㅋㅋ
-The club of version of To Me is so addicting.. I keep hearing it in my mind..
-To Me.. I'm on 00:00:42 right now.. I don't know how long can I endure it..
-Beautiful Girls.. I never skip it whenever it comes up on my playlist, though..
-Beautiful Girls.. The lyrics are the only problems, the whole song is actually just fine..ㅋㅋㅋ And for the club version of To Me, I don't even want to talk about it..ㅋㅋㅋㅋ
-What are these..ㅋㅋㅋㅋㅋ
-Beautiful Girls would've been a better song if only they skip that absence list thingㅋㅋㅋㅋ
-It's my first time hearing the club version of To Me..ㅋㅋㅋㅋ It's on a whole different level..
-The song is 6 minutes long..ㅋㅋㅋㅋ
-To Me..ㅋㅋㅋㅋ I thought I was listening to the Instrument version of itㅋㅋㅋ
-I don't know who Yoo Youngjin is but he's got a very nice voiceㅋㅋㅋ
-I've been listening to the first 30 secs of To Me, and I personally think it's fine..
-I've been listening to the first 1 min now.. I want to hear the girls singing..
-1.30.. I can't listen to it anymore..
-SNSD's song without SNSD's voices in it..ㅋㅋㅋㅋ
-I don't know what's wrong with To Me Club Ver.. It sounds great..
-Ah.. I was so surprised when I listened to that SNSD's song..ㅋㅋㅋ I didn't see the title..
-I thought my phone was lagging so I replayed it for a few times..
-I can't believe there's a song that's 6 minutes long..ㅋㅋㅋㅋ
