-- Database schema
| torrents : groupName [ TEXT ] , totalSnatched [ INTEGER ] , artist [ TEXT ] , groupYear [ INTEGER ] , releaseType [ TEXT ] , groupId [ INTEGER ] , id [ INTEGER ] primary_key | tags : index [ INTEGER ] primary_key , id [ INTEGER ] , tag [ TEXT ] |
-- -- How many releases by the artist michael jackson are tagged "pop"?

SELECT COUNT(T1.groupName) FROM torrents AS T1 INNER JOIN tags AS T2 ON T1.id = T2.id WHERE T2.tag = 'pop' AND T1.artist = 'michael jackson';