my.sql

SELECT
	t.Name AS TrackName,
	(t.Milliseconds / 1000) AS Seconds
FROM
	Track AS t
	WHERE Milliseconds > (
	SELECT
		Milliseconds
	FROM
		Invoice
		NATURAL JOIN InvoiceLine
		LEFT JOIN Track ON Track.TrackId = InvoiceLine.TrackId
	GROUP BY
		InvoiceLine.TrackId
	ORDER BY
		COUNT(*)
		DESC,
		Milliseconds DESC
	LIMIT 0,1
) ORDER BY Milliseconds;