What's a Frenchman with euros to burn to do? If you're Bernard Arnault, head of tr�s luxe company LVMH Mo�t Hennessy Louis Vuitton and France's wealthiest man, you get yourself some good bubbly! Arnault's investment vehicle, Groupe Arnault holds stakes in many luxury brands, including LVMH's Dom P�rignon, Mo�t & Chandon, Louis Vuitton, TAG Heuer, and Christian Dior (which Arnault also heads). Other investments include retail giant Carrefour, Princess Yachts, and Belgian construction group Bouyges. Groupe Arnault's media venture capital fund Europ@Web sold Oxygen Media for $875 million in 2007. It hasn't always fared so well, though: It lost money on failed ventures Zebank and boo.com.