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Wiktionary
top of the line

a. (context idiomatic English) The best, fanciest, or highest quality, especially among selections in a product line.

WordNet
top of the line

n. the best (most expensive) in a given line of merchandise

Wikipedia
Top of the Line

Top of the Line is the debut solo album by Tito "El Bambino". It was released on April 4, 2006 by EMI Televisa Music. Top of The Line featured 20 songs, with collaboration from artists such as Daddy Yankee, Don Omar and Beenie Man. It featured quite a number of hits, such as "Caile", "Mía" (with Daddy Yankee), "Tu Cintura" (with Don Omar), "Flow Natural" (with Beenie Man and Deevani) "Secreto", "Máximo", "Tuve Que Morir" and "Me Da Miedo" among others. Caile was the first single and it peaked at #2 in the Billboard Hot Latin charts. Top of the Line: El Internacional edition includes a bonus DVD featuring live concert footage and music videos. It was released February 6, 2007 and was nominated for a Lo Nuestro Award for Urban Album of the Year.

Top of the Line (Rittz album)

Top of the Line is the third studio album by American rapper Rittz. The album was released on May 6, 2016, by Strange Music.