CREATE TABLE table_7147 ("Year" FLOAT, "Artist" TEXT, "Album" TEXT, "Label" TEXT, "Credit" TEXT)

Who was the artist for the album, Christmas under the reunion label with the guitar?
SELECT "Artist" FROM table_7147 WHERE "Label" = 'reunion' AND "Credit" = 'guitar' AND "Album" = 'christmas'
SELECT "Artist" FROM "table_7147" WHERE "Album" = 'christmas' AND "Credit" = 'guitar' AND "Label" = 'reunion'