Cities around the world today will be filled with the sounds of the Live Earth concert — actually a series of nine concerts in cities including New York, Johannesburg, Tokyo and Sydney to raise awareness about climate change. The 24-hour, seven-continent concert will bring together more than 100 entertainers, including superstars The Police and Kanye West (New York), Madonna (London), Lenny Kravitz (Rio), and Shakira (Hamburg).

NBC will broadcast a three-hour special featuring highlights from the day's events and live performances from New York tonight, but that's not all. Bravo will have 18 hours of live coverage, and several of NBC's other channels — including the Sundance Channel and Telemundo — also will carry parts of the broadcast. The networks and concert organizers are also working together to keep commercial interruptions to a minimum.

If you're watching the coverage today, check in here and let us know which performers were your favorites. MSN will be streaming coverage online all day, and to see which channels will be broadcasting the concert in the United States — and to watch a video about Spinal Tap reuniting to perform in London — read more

All times Eastern — those in other time zones should check their local listings.

• Universal HD: 4 a.m. Saturday to 2 a.m. Sunday
• Sundance Channel: 4 a.m. Saturday to 2 a.m. Sunday
• MSNBC: 8 a.m. Saturday to 4 p.m. Sunday
• CNBC: 8 a.m. Saturday to 2 a.m. Sunday
• Bravo: 9 a.m. Saturday to 2 a.m. Sunday
• Mun2: 5 p.m. to 7 p.m. Saturday
• Telemundo: 7 p.m. to 8 p.m. Saturday
• NBC: 8 p.m. to 11 p.m. Saturday