Did this as a special request ;)

SELECT * FROM gallery2 WHERE topic_id="1587550" UNION SELECT * FROM gallery2 WHERE topic_id="426231" UNION SELECT * FROM gallery2 WHERE topic_id="1185488" UNION SELECT * FROM gallery2 WHERE topic_id="537493" UNION SELECT * FROM gallery2 WHERE topic_id="773891" UNION SELECT * FROM gallery2 WHERE topic_id="1122708" UNION SELECT * FROM gallery2 WHERE topic_id="533503" UNION SELECT * FROM gallery2 WHERE topic_id="1110039" UNION SELECT * FROM gallery2 WHERE topic_id="1615669" UNION SELECT * FROM gallery2 WHERE topic_id="1051816" UNION SELECT * FROM gallery2 WHERE topic_id="555568" UNION SELECT * FROM gallery2 WHERE topic_id="1574165" UNION SELECT * FROM gallery2 WHERE topic_id="974376" UNION SELECT * FROM gallery2 WHERE topic_id="313793" UNION SELECT * FROM gallery2 WHERE topic_id="42969" UNION SELECT * FROM gallery2 WHERE topic_id="287358"