When it comes to his personal life, Marc Anthony is usually very reserved – even with the privacy of his close circle of friends. However, when it comes to celebrating his accomplishments or special moments, the singer has no qualms about doing it publicly. Last weekend, Marc gave a shoutout to Luis Miguel on his 50th birthday and gave him a birthday greeting, reminding us that he is one of his lesser-known friends, but he is of very high esteem.