Is Sean Penn Madonna's lucky star? It sure did appear that way at a recent concert. The 52-year-old Milk actor appeared completely consumed by the controversial crooner at her recent concert in Los Angeles. According to looky loos, Penn was going gaga over his ex-wife as he stood in the front row, cheering her on. One attendee tells Us Weekly, "Their chemistry was off the charts. Madonna seemed to be performing entirely for Sean. And he was saying things like 'Amazing!' and 'She's so hot!'" Despite having an extremely rocky four-year marriage back in the mid-eighties, the singer and the outspoken actor managed to remain friends. The last time they were publicly seen together was back in 2010 while dining at a fancy restaurant. Their appearance together raised eyebrows and started rumors churning that they could possibly reunite. Although eyewitnesses say Penn appeared smitten, it's highly unlikely that the Madonna and Penn would ever get back together. A close pal tells Us Weekly, "They've remained close friends. But they are fire and fire together romantically. She can only be with someone she can control." While Penn is currently on the market, the Material Girl has been hooking up with 26-year-old Brahim Zaibat for about two years. That said, Madge's inner circle of always hoped she would reconcile with her ex. The Us Weekly source adds, "Madonna's friends wish she'd get back with Sean. He will always be the love of her life."