There's something fascinating about musician couples. Not only can they make hit songs alone on stage but they can collaborate to rock out and make music together. The fact that these rock legends are possibly hitting high notes on stage and off is something that America can not seem to get enough of. We adore when musicians fall in love and we follow the every progression of their relationship. Each year, new rocker couples develop and some even traveled to the Windy City to participate in Lollapalooza. Here's a look at the top five newest musician couples of 2008.

Lindsay Lohan and Samantha Ronson.

Whether these gals are just best friends or lovers is still to be determined but they were getting pretty affectionate with one another this past week at the summer concert tour, Lollapalooza. Ronson was a special guest for the weekend, mixing at several clubs, such as Crimson and The Music Lounge at the Hard Rock Hotel. In between turning tables, the DJ was seen holding hands and taking cigarette breaks with Lohan. The duo also double dated with Ronson's brother, fellow DJ Mark Ronson, before heading back to L.A.

Ashlee Simpson and Pete Wentz.

The newlyweds and expecting couple also headed to Chicago for the Lollapalooza festivities. The coupled rocked out and hosted the Pete's Angels & Kings party in Chicago on Saturday night. Simpson is still one of the most fashionable pregnant women, keeping true to her hipster roots. The pair, who was married in May, is so excited to welcome their new baby into the world that they are already talking about taking it on tour with them and Miley Cirus has offered to babysit for them.