The vocalist for the 3rd and 4th openings to Gundam Seed is Tamaki Nami (family name first). Believe lists "See-Saw" and Realize lists "Shindou Naomi" (who? ).

The lyricist & composer on Believe are, naturally, incorrect as well.

References:

http://www.animenewsnetwork.com/ency...ime.php?id=883
http://www.cdjapan.jp/detailview.html?KEY=SRCL-6084