The postcard shows an artwork by Lyra Abueg Garcellano entitled Dance Fever (in colored pencils and aquarell). Lyra Abueg Garcellano graduated from the Ateneo de Manila University with a bachelor’s degree in Interdisciplinary Studies (1994) and from the University of the Philippines with a bachelor’s degree in Fine Arts (2000). She is an accomplished illustrator of children’s books and is the author of a comic strip in a national daily newspaper.
I couldn't find additional information about the painting (size) nor its location (private collection or museum).
A survey of contemporary Filipino art: Lyra Abueg Garcellano