"ULTIMELTS ~Best of AnnMelts 1983-2013~" is Ann-Melts P's fifth album and first best of compilation. It has 32 tracks in total, with 16 tracks on two discs. The first disc features mainly original songs, and the second disc mainly features arrangements of Ann-Melts P's songs by many different producers. It was released at THE VOC@LOID M@STER 24. A crossfade can be seen on both NicoNico Douga and YouTube.