Like cookouts, sunbathing and vacations, live music is a staple of summer. Get into the groove this season with the best concert-going gear on the Web. If you’re lucky enough to score tickets to a venue that permits coolers or picnic baskets, try the coastal basket from Picnicbaskets.com ($100, with free shipping).  The basket includes picnic supplies for four. Choose a gingham lining that’s red and white or blue and white. Igloo’s Playmate icy tunes gripper cooler (pictured) gets you jamming before the performer hits the stage ($66).  Hook up any MP3 player to this cooler, which is equipped with speakers and an amplifier. Stadium seating is often the norm for bigger-name acts like Bruce Springsteen or Coldplay. Keep your bottom comfy, while keeping your whistle, ahem, wet. The sippin seat has an internal flexible flask that holds 3 12 oz. cans worth of cold or warm beverages ($29).  Find your way back to your seat from the concession stand (or back to your car when the usher discovers your Sippin Seat) with this mini microbeam flashlight that attaches to any keychain ($20 each or 2 for $30). For those all-day outdoor gigs like Lollapalooza or Virgin Fest, sunscreen is a must.  MD Skincare’s SPF  30 individual towelettes are perfect for slipping into your bag and applying on the go (60 applications for $42).  Keep the sun out of your face and your head cool with one of the season’s trendy fedoras. This Spillane straw fedora from Urban Outfitters hits the right mix of cool and utilitarian ($28).  You never know when Mother Nature might unleash a thunderstorm.  Don’t be stuck scurrying for cover with thousands of fans : Be prepared with this stylish Marimekko “Ruusupuu” rain poncho ($75).  It comes with a small tote bag for easy storage.