Gavin Rossdale, aka Mr. Gwen Stefani, has had major success in bands -- first as lead singer and guitarist for British alt-rockers Bush, who sold more than 10 million albums, and then with the short-lived band Institute. Now Gav's releasing his first solo album, and his wife is giving him her full vocal support on one of the tracks.

On the other hand, "Kingston is not on the record," said Rossdale of the couple's one-year-old son. "But the missus sings some real nice stuff on 'Some Days.'" The album, "Wanderlust," drops June 3.

Gwen's hubby will have a hard time following her solo act: She skyrocketed to fame after debuting as frontwoman of No Doubt. The native of Orange County, California, is now an international icon thanks to her massively popular clothing line, L.A.M.B. (Love. Angel. Music. Baby. -- also the title of her first solo album). But don't expect trouble in this celebrity paradise: It sounds like the duo are in harmony so far.

And the Stefani-Rossdales have another collaboration in the works: Gwen is five months pregnant with a sibling for Kingston. No word yet on whether it's a prince or princess for the reigning rock-star couple.