Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Billboard Latin Music Award for Reggaeton Song of the Year
Table title:
Recipients
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Performing artist(s) </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Work </th><th colspan=1 rowspan=1 > Nominees </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <th colspan=1 rowspan=1 > 2006 </th><td colspan=1 rowspan=1 > Luny Tunes & Baby Ranks featuring Daddy Yankee, Wisin & Yandel, Hector "El Father" and Tony Tun Tun </td><td colspan=1 rowspan=1 > Dominican Republic & Puerto Rico </td><td colspan=1 rowspan=1 > "Mayor Que Yo" </td><td colspan=1 rowspan=1 > Angel & Khriz — "Ven Bailalo" Daddy Yankee — "Lo Que Paso, Paso" Wisin & Yandel — "Rakata" </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 2007 </th><td class="highlighted"  colspan=1 rowspan=1 > R.K.M & Ken-Y </td><td class="highlighted"  colspan=1 rowspan=1 > Puerto Rico </td><td class="highlighted"  colspan=1 rowspan=1 > "Down" </td><td colspan=1 rowspan=1 > Daddy Yankee — "Machucando" Tito "El Bambino" — "Caile" Wisin & Yandel — "Pam Pam" </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 2008 </th><td class="highlighted"  colspan=1 rowspan=1 > R.K.M & Ken-Y </td><td class="highlighted"  colspan=1 rowspan=1 > Puerto Rico </td><td class="highlighted"  colspan=1 rowspan=1 > "Igual Que Ayer" </td><td colspan=1 rowspan=1 > Casa de Leones — "No Te Veo" Don Omar — "Ayer La Vi" Hector "El Father" — "Sola" </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
When and for which work did the Puerto Rican duo R.K.M & Ken-Y receive the Billboard Latin Music Award?
Answer:
Puerto Rican duo R.K.M & Ken-Y received the accolade twice, first at the Billboard Latin Music Awards of 2007, for the single "Down" and again at the Billboard Latin Music Awards of 2008 for "Igual Que Ayer".