But beyond the glitz and glamour of red carpets and recording studios, some relationships have actually lasted through the years.
Of our brief list of 10 couples, Sting and Trudie Styler have lasted the longest (married since 1992). But that's nothing compared to, say, Martin Sheen and his wife Janet Templeton, who have been married for nearly 51 years. Rock's King and Queen, Ozzy and Sharon Osbourne, will celebrate 30 years of marriage this year.
In honor of Valentine's Day 2012, here are 10 Hollywood couples that have stuck together (in no particular order).