I can't give the "vernacular" name for these (the shortened ones that people actually type, but according to promo CDs these are "official" katakana for these songs...
a song is born: ア・ソング・イズ・ボーン
CAROLS: キャロルス
Dearest: ディアレスト
SURREAL: サーリアル
Free & Easy: フリー・アンド・イージー
M: エム
poker face: ポーカー・フェイス
RAINBOW: レインボー
Voyage: ヴォヤージュ (It seems we're supposed to pronounce it like the french way rather than the english way o_O never noticed that before)
And it's worth noting that ayu's "H" is pronounced エイチ rather than エッチ
