And in music news, iTunes is celebrating as it delivered its 10 billionth song last week. iTunes’ successful digital downloading service began in 2003, and this 10 billion mark is a major milestone for Apple.

As Cupertino recovers from a weekend of champagne and revelry, here are some highlights worth googling:

1. The 10 billionth iTunes download is “Guess Things Happen That Way” by Johnny Cash. It was downloaded by Louie Sulcer of Woodstock, Georgia, who won a $10,000 iTunes Gift Card as part of Apple’s 10 Billion Songs Countdown contest.

2. The most legally downloaded song of all time (or at least since iTunes started in ’03) is “I Gotta Feeling” by Black Eyed Peas, followed by Lady Gaga’s “Poker Face” and “Boom Boom Pow,” also by BEP. View the complete list here.

3. Online experts are predicting that iTunes will be tweaking its services to compete with other online downloading companies. Among the possible improvements are cheaper download prices and streaming options.