Aside from acting in so many series, a number of times, Music/MegumiHayashibara also sang for them as well (often the opening song).
%% WeblinksAreNotExamples. Just a Youtube link with no further explanation is not a proper example. Explain what makes these songs awesome so that someone who hasn't even heard OF the tracks in question, never mind heard them, understands why they're awesome without clicking on the link. If the video is taken down, the example is literally completely empty.
%%* [[ Happy Birthday to Me]] (Anime/AllPurposeCulturalCatGirlNukuNuku)
%%** [[ Fine Colorday]] (Nuku Nuku TV OP)
%%** [[ Oyasuminasai Ashita wa Ohayou]] (Nuku Nuku TV ED)
%%* [[ Get Along]] ({{LightNovel/Slayers}})
%%** [[ Meet again]] (Slayers 10th Anniversary)
%%** [[ Give a Reason]] (Slayers NEXT)
%%** [[ Breeze]] (Slayers TRY)
%%** [[ don't be discouraged]] (Slayers TRY)
%%** [[ MIDNIGHT BLUE]] (Slayers: The Motion Picture)
%%** [[ raging waves]] (Slayers Gorgeous)
%%** [[ feel well]] (Slayers Premium)
%%** [[ Just be conscious]] (Slayers RETURN)
%%** [[ Going History]] (Slayers EX)
%%** [[ Kagirinai Yokubou no Naka ni]] (Slayers Special)
%%** [[ Touch Yourself]] (Slayers Royal)
%%** [[ Revolution]] (Slayers REVOLUTION)
%%** [[ Reflection]] (Slayers GREAT)
%%** [[ Plenty of grit]] (Slayers REVOLUTION)
%%** [[ Front breaking]] (Slayers EVOLUTION-R)
%%** [[ Sunadokei]] or "Hourglass" (Slayers EVOLUTION-R)
%%* [[ ~infinity~]] (Anime/LostUniverse)
%%* [[ Sakura Saku]] (Manga/LoveHina)
%%* [[ Successful Mission]] (Anime/SaberMarionetteJ)
%%** [[ I'll be there]] (Anime/SaberMarionetteJ - Beware, video is spoiler-tastic)
%%** [[ Hesitation]] (Saber Marionette J Again)
%%** [[ Proof of Myself]] (Saber Marionette J to X)
%%** [[ Lively Motion]] (Saber Marionette J to X)
%%* [[ Over Soul]] (Manga/ShamanKing)
%%* [[ Northern lights]] (Shaman King)
%%* [[ Omokage]] (Shaman King)
%%* [[ brave heart]] (Shaman King)
%%* [[ Alchemy of Love ~Ai no Renkinjyou~]] (Tenchi Muyo in Love)
* [[ Anata no Kokoro ni]], the ending theme of ''Anime/MagicalShoppingArcadeAbenobashi''. The yearning tone of Music/MegumiHayashibara's voice, the lyrics, and the black-and-white images of Osaka's past; if all that together doesn't call up a sense of loss, nothing will.
%%** The opening theme, [[ Treat or Goblins]].
* Her songs for the newer ''Anime/NeonGenesisEvangelion''. We've got [[ Shuuketsu no Sono e]], [[ its Ayanami ver.]], and [[ Shuuketsu no Sadame]].
* The songs [[ "Kyou no Hi wa Sayonara" ("Today is a Day for Good-bye")]] and [[ "Tsubasa wo Kudasai" ("Give Me Wings")]] from ''Anime/RebuildOfEvangelion'' were both performed by her.
* Chances are that if you've seen the hit TV/OVA/Movie series, ''{{LightNovel/Slayers}}'', you've found yourself humming along to one of the ''many'' songs sung by Megumi. They are just that catchy and memorable to any long-time anime fan. One of the most, if not THE most iconic song is [[ Give a Reason]] from the 2nd TV series opening. It is so popular that it was used in one of the climax scenes at the end of the new series - nearly 15 years after the original run.
* From ''Manga/ShamanKing'', we have [[ Over Soul]] (the first opening song), [[ Northern Lights]] (the second opening song), [[ Omokage]] (the second ending song), and [[ brave heart]], all done by her. Bonus points for the fact that all four were sung by the same girl who also voices Anna Kyoyama.