Complex sentence: Luis Miguel was the first Latin artist to have two albums certified platinum, with "Romance" and "Segundo Romance", with the latter being the 21st best-selling Latin album in the United States with sales of over 603,000 copies.
Split into simpler sentences: Luis Miguel was the first Latin artist to have two albums certified platinum, with "Romance" and "Segundo Romance". The latter album is also the 21st best-selling Latin album in the United States with sales of over 603,000 copies.